NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Mar. 31, 2013

NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Schedule of activity in the allowance for doubtful accounts

(In thousands)	Balance at Beginning of Year		Charged to Costs and Expenses			Deductions or Write- offs Charged to Reserves		Balance at End of Year
Fiscal 2013	$	255	$	344		$	248	$	351
Fiscal 2012	$	334	$	(79	)	$	—	$	255
Fiscal 2011	$	330	$	4		$	—	$	334

Schedule of components of inventories, net of inventory reserves

(In thousands)	2013		2012
Raw materials, completed subassemblies and spare parts	$	21,450	$	23,689
Work-in-process	21,129		16,705
Finished goods	5,472		7,785
Total	$	48,051	$	48,179

Schedule of activity in the reserve for excess or obsolete inventory

(In thousands)	Balance at Beginning of Year		Charged to Costs and Expenses		Deductions / Write- offs Charged to Reserves		Balance at End of Year
Fiscal 2013	$	6,210	$	5,061	$	219	$	11,052
Fiscal 2012	$	4,882	$	3,076	$	1,748	$	6,210
Fiscal 2011	$	3,982	$	1,604	$	704	$	4,882

Schedule of building, equipment and leasehold improvements

(In thousands)	Estimated Useful Lives	2013			2012
Building and leasehold improvements	Lesser of 25 years or remaining lease term	$	21,245		$	20,761
Equipment and tooling	5-10 years	5,284			5,110
Computer equipment and software	3-5 years	23,135			21,491
Furniture and fixtures	5-7 years	2,553			2,515
Demo and test equipment	2-5 years	7,579			6,576
Leased equipment	1-2 years or life of lease	63			63
Motor vehicles	3-5 years	72			72
Total		59,931			56,588
Less accumulated depreciation and amortization		(43,480		)	(38,590		)
Building, equipment and leasehold improvements, net		$	16,451		$	17,998

Schedule of accrued salaries and benefits

(In thousands)	2013		2012
Accrued payroll and payroll related taxes	$	1,995	$	2,140
Accrued incentive compensation	4,633		7,486
Accrued vacation	1,739		2,096
Accrued severance	1,607		—
Total accrued salaries and benefits	$	9,974	$	11,722

Schedule of other current liabilities

(In thousands)	2013		2012
Accrued accounts payable and other expenses	$	4,213	$	999
Accrued contract related costs	7,596		2,808
Accrued audit and legal fees	375		523
Accrued sales commissions	2,010		1,659
Total other current liabilities	$	14,194	$	5,989

Schedule of calculation of basic and diluted earnings per share

(In thousands except per share amounts)	March 31, 2013		March 31, 2012		March 31, 2011
Earnings per Share — Basic:
Net income	$	17,454	$	21,422	$	42,817
Weighted average number of common shares outstanding — basic	8,394		9,046		9,045
Income per share — basic	$	2.08	$	2.37	$	4.73
Earnings per Share — Diluted:
Net income	$	17,454	$	21,422	$	42,817
Weighted average number of common shares outstanding — basic	8,394		9,046		9,045
Assumed exercise of stock options, warrants, restricted stock and restricted stock units, using the treasury stock method	54		102		202
Weighted average number of common and potential common shares outstanding — diluted	8,448		9,148		9,247
Income per share — diluted	$	2.07	$	2.34	$	4.63

Schedule of common stock cash dividends declared

Date Declared	Dividend per common share
May 14, 2012	$	0.50
August 2, 2012	0.50
November 5, 2012	0.50
February 11, 2013	0.50
Fiscal year ended March 31, 2013	$	2.00

Summary of share-based compensation costs included in the consolidated statements of operations

	Fiscal Year Ended
(In thousands)	March 31, 2013			March 31, 2012		March 31, 2011
Cost of revenues	$	188		$	438	$	797
Selling, general and administrative	(4		)	1,361		4,419
Total share-based compensation expense before tax	$	184		$	1,799	$	5,216

Schedule of estimation of the fair value of options at date of grant

	March 31, 2011
Assumptions:
Expected life	5 years
Risk-free interest rate	1.60%
Stock volatility	44%
Dividend yield	1.6%