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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Jan. 28, 2012	Feb. 24, 2012
Document and Entity Information
Entity Registrant Name	AeroVironment Inc
Entity Central Index Key	0001368622
Document Type	10-Q
Document Period End Date	Jan. 28, 2012
Amendment Flag	false
Current Fiscal Year End Date	--04-30
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		22,133,478
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3

Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 28, 2012	Apr. 30, 2011
Current assets:
Cash and cash equivalents	$ 65,865	$ 62,041
Short-term investments	88,572	126,839
Accounts receivable, net of allowance for doubtful accounts of $984 at January 28, 2012 and $639 at April 30, 2011	24,213	44,376
Unbilled receivables and retentions	24,507	21,966
Inventories, net	48,447	38,137
Deferred income taxes	2,810	2,300
Prepaid expenses and other current assets	2,793	2,372
Total current assets	257,207	298,031
Long-term investments	36,497	6,275
Property and equipment, net	20,936	17,498
Deferred income taxes	9,704	9,762
Other assets	201	181
Total assets	324,545	331,747
Current liabilities:
Accounts payable	13,375	31,134
Wages and related accruals	13,726	15,458
Income taxes payable	1,927	7,404
Other current liabilities	9,114	7,384
Liability for uncertain tax positions	724	724
Total current liabilities	38,866	62,104
Wages and other accruals	1,124	762
Deferred rent	1,081	1,275
Liability for uncertain tax positions	3,656	4,138
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.0001 par value: Authorized shares - 10,000,000 None issued or outstanding
Common stock, $0.0001 par value: Authorized shares - 100,000,000 Issued and outstanding shares - 22,146,714 at January 28, 2012 and 21,949,884 at April 30, 2011	2	2
Additional paid-in capital	123,371	119,765
Accumulated other comprehensive loss	(697)	(784)
Retained earnings	157,142	144,485
Total stockholders' equity	279,818	263,468
Total liabilities and stockholders' equity	$ 324,545	$ 331,747

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jan. 28, 2012	Apr. 30, 2011
Consolidated Balance Sheets
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 984	$ 639
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, Authorized shares	10,000,000	10,000,000
Preferred stock, issued shares	0	0
Preferred stock, outstanding shares	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, Authorized shares	100,000,000	100,000,000
Common stock, Issued shares	22,146,714	21,949,884
Common stock, outstanding shares	22,146,714	21,949,884

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Consolidated Statements of Income - USD ($) $ in Thousands	Jan. 28, 2012	Jan. 29, 2011	Jan. 28, 2012	Jan. 29, 2011
Revenue:
Product sales	$ 36,645	$ 45,996	$ 113,802	$ 90,710
Contract services	35,319	38,438	100,531	95,733
Total revenue	71,964	84,434	214,333	186,443
Cost of sales:
Product sales	23,587	25,869	69,958	55,201
Contract services	20,944	24,436	64,597	63,302
Total cost of sales	44,531	50,305	134,555	118,503
Gross margin	27,433	34,129	79,778	67,940
Selling, general and administrative	12,866	10,578	38,806	34,634
Research and development	7,238	7,872	23,640	24,533
Income from operations	7,329	15,679	17,332	8,773
Other income:
Interest income	129	49	313	215
Income before income taxes	7,458	15,728	17,645	8,988
Provision for income taxes	1,714	4,274	4,988	715
Net income	$ 5,744	$ 11,454	$ 12,657	$ 8,273
Earnings per share data:
Basic (in dollars per share)	$ 0.26	$ 0.53	$ 0.58	$ 0.38
Diluted (in dollars per share)	$ 0.26	$ 0.52	$ 0.57	$ 0.38
Weighted average shares outstanding:
Basic (in shares)	21,797,802	21,594,032	21,761,927	21,568,541
Diluted (in shares)	22,317,015	22,096,989	22,269,675	22,046,479

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jan. 28, 2012	Jan. 29, 2011
Operating activities
Net income	$ 12,657	$ 8,273
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	6,418	8,105
Provision for doubtful accounts	354	59
Deferred income taxes	(510)	125
Stock-based compensation	2,319	1,672
Tax benefit from exercise of stock options	664	493
Excess tax benefit from stock-based compensation	(115)
Gain on sale of property and equipment	(13)	(54)
Changes in operating assets and liabilities:
Accounts receivable	19,809	(5,866)
Unbilled receivables and retentions	(2,541)	(859)
Inventories	(10,310)	(7,952)
Other assets	(441)	(1,198)
Accounts payable	(17,759)	2,962
Other liabilities	(5,678)	(2,739)
Net cash provided by operating activities	4,854	3,021
Investing activities
Acquisitions of property and equipment	(9,856)	(6,207)
Proceeds from the sale of property and equipment	13	108
Net sales of held-to-maturity investments	7,965	12,986
Net sales of available-for-sale investments	225	200
Net cash (used in) provided by investing activities	(1,653)	7,087
Financing activities
Excess tax benefit from stock-based compensation	115
Exercise of stock options	508	326
Net cash provided by financing activities	623	326
Net increase in cash and cash equivalents	3,824	10,434
Cash and cash equivalents at beginning of period	62,041	28,665
Cash and cash equivalents at end of period	65,865	39,099
Supplemental disclosure:
Unrealized gain (loss) on long-term investments recorded in other comprehensive income, net of deferred taxes of $59 and $43, respectively	$ 87	$ (65)

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Jan. 28, 2012	Jan. 29, 2011
Consolidated Statements of Cash Flows
Unrealized gain (loss) on long-term investments recorded in other comprehensive income, deferred taxes	$ 59	$ 43

Organization and Significant Accounting Policies

9 Months Ended

Jan. 28, 2012

Organization and Significant Accounting Policies

Organization and Significant Accounting Policies

1. Organization and Significant Accounting Policies

Organization

AeroVironment, Inc., a Delaware corporation (the “Company”), is engaged in the design, development, production, operation and support of unmanned aircraft systems and efficient energy systems for various industries and governmental agencies.

Basis of Presentation

The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and with the instructions of Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements. In the opinion of management, all adjustments, consisting only of normal recurring adjustments necessary for a fair presentation with respect to the interim financial statements have been included. The results of operations for the three and nine months ended January 28, 2012 are not necessarily indicative of the results for the full year ending April 30, 2012. For further information, refer to the consolidated financial statements and footnotes thereto for the year ended April 30, 2011, included in AeroVironment, Inc.’s Annual Report on Form 10-K.

The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions, including estimates of anticipated contract costs and revenue utilized in the revenue recognition process, that affect the reported amounts in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.

The Company’s consolidated financial statements include the assets, liabilities and operating results of wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated.

Segments

The Company’s products are sold and divided among two reportable segments to reflect the Company’s strategic goals. Operating segments are defined as components of an enterprise from which separate financial information is available that is evaluated regularly by the Chief Operating Decision Maker (“CODM”) in deciding how to allocate resources and in assessing performance. The Company’s CODM is the Chief Executive Officer, who reviews the revenue and gross margin results for each of these segments in order to make resource allocation decisions, including the focus of research and development (“R&D”) activities and assessing performance. The Company’s reportable segments are business units that offer different products and services and are managed separately.

Investments

The Company’s investments are accounted for as held-to-maturity and available-for-sale and reported at amortized cost and fair value, respectively.

Fair Values of Financial Instruments

Fair values of cash and cash equivalents, accounts receivable, unbilled receivables, retentions and accounts payable approximate cost due to the short period of time to maturity.

Government Contracts

Payments to the Company on government cost reimbursable contracts are based on provisional, or estimated indirect rates, which are subject to an annual audit by the Defense Contract Audit Agency (“DCAA”). The cost audits result in the negotiation and determination of the final indirect cost rates that the Company may use for the period(s) audited. The final rates, if different from the provisional billing rates, may create an additional receivable or liability for the Company.

For example, during the course of its audits, the DCAA may question the Company’s incurred project costs, and if the DCAA believes the Company has accounted for such costs in a manner inconsistent with the requirements under Federal Acquisition Regulations, the DCAA auditor may recommend to the Company’s administrative contracting officer to disallow such costs. The Company can provide no assurance that the DCAA or other government audits will not result in material disallowances for incurred costs in the future.

Earnings Per Share

Basic earnings per share is computed using the weighted-average number of common shares outstanding, excluding shares of unvested restricted stock. The dilutive effect of potential common shares outstanding is included in diluted earnings per share and excludes any anti-dilutive effects of options and shares of unvested restricted stock.

The reconciliation of diluted to basic shares is as follows:

	Three Months Ended		Nine Months Ended
	January 28, 2012	January 29, 2011	January 28, 2012	January 29, 2011
Denominator for basic earnings per share:
Weighted average common shares outstanding, excluding unvested restricted stock	21,797,802	21,594,032	21,761,927	21,568,541
Dilutive effect of employee stock options and unvested restricted stock	519,213	502,957	507,748	477,938
Denominator for diluted earnings per share	22,317,015	22,096,989	22,269,675	22,046,479

During the three and nine months ended January 28, 2012 and January 29, 2011, certain shares reserved for issuance upon exercise of stock options and shares of unvested restricted stock were not included in the computation of diluted earnings per share because their inclusion would have been anti-dilutive. The number of shares reserved for issuance upon exercise of stock options and shares of unvested restricted stock that met this anti-dilutive criterion was approximately 22,000 and 29,000 for the three and nine months ended January 28, 2012, respectively. The number of shares reserved for issuance upon exercise of stock options and shares of unvested restricted stock that met this anti-dilutive criterion was approximately 24,000 and 49,000 for the three and nine months ended January 29, 2011, respectively.

Recently Issued Accounting Standards

In June 2011, the Financial Accounting Standards Board (“FASB”) issued accounting guidance which requires companies to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The new guidance eliminates the option to present the components of other comprehensive income as part of the statement of equity. The new guidance is effective for the Company’s interim and annual reporting periods beginning on May 1, 2012 and will be applied retrospectively, with early adoption permitted. The Company does not expect the adoption of this new guidance to have a material impact on the Company’s consolidated financial statements, other than the change in presentation described in the new guidance.

In May 2011, the FASB issued accounting guidance to provide a consistent definition of fair value and to ensure that the fair value measurement and disclosure requirements are similar between generally accepted accounting principles in the United States and International Financial Reporting Standards. The new guidance changes certain fair value measurement principles and enhances the disclosure requirements particularly for Level 3 fair value measurements. The new guidance is effective for the Company’s interim and annual reporting periods beginning on May 1, 2012 and will be applied prospectively. The Company is currently evaluating the potential impact of this adoption on its consolidated financial statements.

- Definition

The entire disclosure for the organization, consolidation and basis of presentation of financial statements disclosure, and significant accounting policies of the reporting entity. May be provided in more than one note to the financial statements, as long as users are provided with an understanding of (1) the significant judgments and assumptions made by an enterprise in determining whether it must consolidate a VIE and/or disclose information about its involvement with a VIE, (2) the nature of restrictions on a consolidated VIE's assets reported by an enterprise in its statement of financial position, including the carrying amounts of such assets, (3) the nature of, and changes in, the risks associated with an enterprise's involvement with the VIE, and (4) how an enterprise's involvement with the VIE affects the enterprise's financial position, financial performance, and cash flows. Describes procedure if disclosures are provided in more than one note to the financial statements.

+ References + Details

Investments

9 Months Ended

Jan. 28, 2012

Investments

Investments

2. Investments

Investments consist of the following (in thousands):

	January 28, 2012		April 30, 2011
Short-term investments:
Held-to-maturity securities:
U.S. government and municipal securities	$	88,572	$	126,839
Total short-term investments	$	88,572	$	126,839
Long-term investments:
Held-to-maturity securities:
U.S. government and municipal securities	$	30,301	$	—
Available-for-sale securities:
Auction rate securities	6,196		6,275
Total long-term investments	$	36,497	$	6,275

Held-To-Maturity Securities

At January 28, 2012, the balance of held-to-maturity securities consisted of state and local government municipal securities and U.S. Treasury bills.

The amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the held-to-maturity investments as of January 28, 2012, were as follows (in thousands):

			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses			Fair Value
Municipal securities	$	69,996	$	37	$	(4	)	$	70,029
U.S. Treasury bills	48,877		8		(1		)	48,884
Total held-to-maturity investments	$	118,873	$	45	$	(5	)	$	118,913

The amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the held-to-maturity investments as of April 30, 2011, were as follows (in thousands):

			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses			Fair Value
U.S. Treasury bills	$	126,839	$	38	$	(3	)	$	126,874
Total held-to-maturity investments	$	126,839	$	38	$	(3	)	$	126,874

The amortized cost and fair value of the Company’s held-to-maturity securities by contractual maturity at January 28, 2012, were as follows (in thousands):

	Cost		Fair Value
Due within one year	$	88,572	$	88,581
Due after one year through five years	30,301		30,332
Total	$	118,873	$	118,913

Available-For-Sale Securities

As of January 28, 2012, the entire balance of available-for-sale securities consisted of four investment grade auction rate municipal bonds with maturities ranging from 8 to 23 years. These investments have characteristics similar to short-term investments, because at pre-determined intervals, generally ranging from 30 to 35 days, there is a new auction process at which the interest rates for these securities are reset to current interest rates. At the end of such period, the Company chooses to roll-over its holdings or redeem the investments for cash. A market maker facilitates the redemption of the securities and the underlying issuers are not required to redeem the investment within 365 days. Interest earned from these investments is recorded in interest income.

During the fourth quarter of the fiscal year ended April 30, 2008, the Company began experiencing failed auctions on some of its auction rate securities. A failed auction occurs when a buyer for the securities cannot be obtained and the market maker does not buy the security for its own account. The Company continues to earn interest on the investments that failed to settle at auction at the maximum contractual rate until the next auction occurs. In the event the Company needs to access funds invested in these auction rate securities, the Company may not be able to liquidate these securities at the fair value recorded on January 28, 2012, until a future auction of these securities is successful or a buyer is found outside of the auction process.

As a result of the failed auctions, the fair values of these securities are estimated utilizing a discounted cash flow analysis as of January 28, 2012. The analysis considers, among other items, the collateralization underlying the security investments, the creditworthiness of the counterparty, the timing of expected future cash flows, and the estimated date upon which the security is expected to have a successful auction.

Based on the Company’s ability to access its cash and cash equivalents, expected operating cash flows, and other sources of cash, the Company does not anticipate the current lack of liquidity of these investments will affect its ability to operate the business in the ordinary course. The Company believes the current lack of liquidity of these investments is temporary and expects that the securities will be redeemed or refinanced at some point in the future. The Company will continue to monitor the value of its auction rate securities at each reporting period for a possible other-than-temporary impairment. The auction rate securities have been in an unrealized loss position for more than 12 months. The Company has the ability and the intent to hold these investments until a recovery of fair value, which may be at maturity, and as of January 28, 2012 it did not consider these investments to be other-than-temporarily impaired.

The amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the available-for-sale investments as of January 28, 2012, were as follows (in thousands):

			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses			Fair Value
Auction rate securities	$	7,350	$	—	$	(1,154	)	$	6,196
Total available-for-sale investments	$	7,350	$	—	$	(1,154	)	$	6,196

The amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the available-for-sale investments as of April 30, 2011, were as follows (in thousands):

			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses			Fair Value
Auction rate securities	$	7,575	$	—	$	(1,300	)	$	6,275
Total available-for-sale investments	$	7,575	$	—	$	(1,300	)	$	6,275

The amortized cost and fair value of the Company’s auction rate securities by contractual maturity at January 28, 2012, were as follows (in thousands):

	Cost		Fair Value
Due after five through 10 years	$	1,825	$	1,682
Due after 10 years	5,525		4,514
Total	$	7,350	$	6,196

- Definition

Tabular disclosure of investments in certain debt and equity securities (and certain other trading assets) which include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. Other trading assets include assets that are carried on the balance sheet at fair value and held for trading purposes. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities (and other trading assets).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 3, 19, 20, 21, 22, 137
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27405-111563

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Debt Security
-URI http://asc.fasb.org/extlink&oid=6509901
-Topic 320

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Equity Security
-URI http://asc.fasb.org/extlink&oid=6511694
-Topic 320

+ Details

Inventories, net

9 Months Ended

Jan. 28, 2012

Inventories, net

Inventories, net

3. Inventories, net

Inventories consist of the following (in thousands):

	January 28, 2012			April 30, 2011
Raw materials	$	11,893		$	13,737
Work in process	14,551			7,994
Finished goods	24,606			17,647
Inventories, gross	51,050			39,378
Reserve for inventory obsolescence	(2,603		)	(1,241		)
Inventories, net	$	48,447		$	38,137

Fair Value Measurements

9 Months Ended

Jan. 28, 2012

Fair Value Measurements

Fair Value Measurements

4. Fair Value Measurements

Fair value is the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value hierarchy contains three levels as follows:

· Level 1 — Inputs to the valuation based upon quoted prices (unadjusted) for identical assets or liabilities in active markets that are accessible as of the measurement date.

· Level 2 — Inputs to the valuation include quoted prices in either markets that are not active, or in active markets for similar assets or liabilities, inputs other than quoted prices that are observable, and inputs that are derived principally from or corroborated by observable market data.

· Level 3 — Inputs to the valuation that are unobservable inputs for the asset or liability.

The Company’s financial assets measured at fair value on a recurring basis at January 28, 2012, were as follows (in thousands):

	Fair Value Measurement Using
Description	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
Auction rate securities	$	—	$	—	$	6,196	$	6,196
Total	$	—	$	—	$	6,196	$	6,196

Due to the auction failures of the Company’s auction rate securities that began in the fourth quarter of fiscal 2008, there are still no quoted prices in active markets for identical assets as of January 28, 2012. Therefore, the Company has classified its auction rate securities as Level 3 financial assets. The following table provides a reconciliation between the beginning and ending balances of items measured at fair value on a recurring basis in the table above that used significant unobservable inputs (Level 3) (in thousands):

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Description	Auction Rate Securities
Balance at April 30, 2011	$	6,275
Transfers to Level 3	—
Total gains (losses) (realized or unrealized)
Included in earnings	—
Included in other comprehensive income	146
Settlements	(225		)
Balance at January 28, 2012	$	6,196
The amount of total gains or (losses) for the period included in earnings (or change in net assets) attributable to the change in unrealized gains or losses relating to assets still held at January 28, 2012	$	—

The auction rate securities are valued using a discounted cash flow model. The analysis considers, among other items, the collateralization underlying the security investments, the creditworthiness of the counterparty, the timing of expected future cash flows, and the estimated date upon which the security is expected to have a successful auction.

Based on the Company’s ability to access its cash and cash equivalents, expected operating cash flows, and other sources of cash, the Company does not anticipate the current lack of liquidity on these investments will affect its ability to operate the business in the ordinary course. The Company believes the current lack of liquidity of these investments is temporary and expects that the securities will be redeemed or refinanced at some point in the future, allowing the Company to recover the original cost of $7.4 million. The Company will continue to monitor the value of its auction rate securities at each reporting period for a possible other-than-temporary impairment.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44A, 44B
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15C, 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15A
-Subparagraph a-d
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+ Details

Other Comprehensive Income

9 Months Ended

Jan. 28, 2012

Other Comprehensive Income

Other Comprehensive Income

5. Other Comprehensive Income

The components of comprehensive income are as follows (in thousands):

	Three Months Ended					Nine Months Ended
	January 28,		January 29,			January 28,		January 29,
	2012		2011			2012		2011
Net income	$	5,744	$	11,454		$	12,657	$	8,273
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on long-term investments	44		(50		)	87		(65		)
Comprehensive income	$	5,788	$	11,404		$	12,744	$	8,208

- Definition

The entire disclosure for comprehensive income. Includes, but is not limited to, the following: 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. Components of comprehensive income include: (1) foreign currency translation adjustments; (2) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (3) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (4) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (5) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (6) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (7) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Warranty Reserves

9 Months Ended

Jan. 28, 2012

Warranty Reserves

Warranty Reserves

6. Warranty Reserves

The Company accrues an estimate of its exposure to warranty claims based upon both current and historical product sales data and warranty costs incurred. The warranty reserve is included in other current liabilities. The related expense is included in cost of sales. Warranty reserve activity is summarized as follows for the three and nine months ended January 28, 2012 and January 29, 2011 (in thousands):

	Three Months Ended						Nine Months Ended
	January 28,			January 29,			January 28,			January 29,
	2012			2011			2012			2011
Beginning balance	$	1,344		$	834		$	1,127		$	804
Warranty expense	785			425			2,037			966
Warranty costs incurred	(482		)	(222		)	(1,517		)	(733		)
Ending balance	$	1,647		$	1,037		$	1,647		$	1,037

Customer-Funded Research & Development

9 Months Ended

Jan. 28, 2012

Customer-Funded Research & Development

Customer-Funded Research & Development

7. Customer-Funded Research & Development

Customer-funded R&D costs are incurred pursuant to contracts (revenue arrangements) to perform R&D activities according to customer specifications. These costs are direct contract costs and are expensed to cost of sales when the corresponding revenue is recognized, which is generally as the R&D services are performed. Revenue from customer-funded R&D was approximately $5.9 million and $15.1 million for the three and nine months ended January 28, 2012, respectively. Revenue from customer-funded R&D was approximately $8.7 million and $30.3 million for the three and nine months ended January 29, 2011, respectively.

- Definition

The entire disclosure for research, development, and computer software activities, including contracts and arrangements to be performed for others and with federal government. Includes costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility and in-process research and development acquired in a business combination consummated during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 2
-Paragraph 12, 13
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-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-FGC
-Chapter 3
-Paragraph 56, 57
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+ Details

Income Taxes

9 Months Ended

Jan. 28, 2012

Income Taxes

Income Taxes

8. Income Taxes

For the three and nine months ended January 28, 2012, the Company recorded a provision for income taxes of $1.7 million and $5.0 million, respectively, yielding an effective tax rate of 23.0% and 28.3%, respectively. The variance from statutory rates for the three and nine months ended January 28, 2012 was primarily due to research and development tax credits. For the three and nine months ended January 29, 2011, the Company recorded a provision for income taxes of $4.3 million and $0.7 million, respectively, yielding an effective tax rate of 27.2% and 8.0%, respectively. The variance from statutory rates for the three and nine months ended January 29, 2011 was primarily due to research and development tax credits.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

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+ Details

Segment Data

9 Months Ended

Jan. 28, 2012

Segment Data

Segment Data

9. Segment Data

The Company’s product segments are as follows:

· Unmanned Aircraft Systems (“UAS”) — The UAS segment focuses primarily on the design, development, production, operation and support of innovative UAS that provide situational awareness and other mission effects to increase the security and operational effectiveness of the Company’s customers.

· Efficient Energy Systems (“EES”) — The EES segment focuses primarily on the design, development, production and support of innovative efficient electric energy systems that address the growing demand for electric transportation solutions.

The accounting policies of the segments are the same as those described in Note 1, “Organization and Significant Accounting Policies.” The operating segments do not make sales to each other. Depreciation and amortization related to the manufacturing of goods is included in gross margin for the segments. The Company does not discretely allocate assets to its operating segments, nor does the CODM evaluate operating segments using discrete asset information. Consequently, the Company operates its financial systems as a single segment for accounting and control purposes, maintains a single indirect rate structure across all segments, has no inter-segment sales or corporate elimination transactions, and maintains limited financial statement information by segment.

The segment results are as follows (in thousands):

	Three Months Ended				Nine Months Ended
	January 28,		January 29,		January 28,		January 29,
	2012		2011		2012		2011
Revenue:
UAS	$	57,247	$	71,733	$	176,383	$	158,796
EES	14,717		12,701		37,950		27,647
Total	71,964		84,434		214,333		186,443
Gross margin:
UAS	23,151		29,003		70,580		56,807
EES	4,282		5,126		9,198		11,133
Total	27,433		34,129		79,778		67,940
Selling, general and administrative	12,866		10,578		38,806		34,634
Research and development	7,238		7,872		23,640		24,533
Income from operations	7,329		15,679		17,332		8,773
Interest income	129		49		313		215
Income before income taxes	$	7,458	$	15,728	$	17,645	$	8,988

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details