Note 11 - Stockholders' Equity and Stock Plans (Tables)

12 Months Ended

Mar. 31, 2014

Stockholders' Equity Note [Abstract]

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

	Fiscal Year Ended March 31,
	2014					2013					2012
	Shares			Weighted Average Price		Shares			Weighted Average Price		Shares			Weighted Average Price
Beginning Balance		5,625		$	12.58		7,500		$	12.58		7,967		$	12.74
Granted		-			-		-			-		-			-
Vested		(1,875	)	$	12.58		(1,875	)	$	12.58		(467	)	$	15.31
Cancelled		-			-		-			-		-			-
Ending Balance		3,750		$	12.58		5,625		$	12.58		7,500		$	12.58

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Fiscal Year Ended March, 31
	2014			2013			2012
Expected dividend yield		0.0	%		0.0	%		0.0	%
Expected volatility		63.02	%		63.34	%		64.44	%
Risk-free interest rate		1.04	%		1.64	%		2.36	%
Expected life (years)		5.37			5.33			5.33
Weighted average fair value of options granted	$	4.37		$	1.99		$	2.99

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	2014		2013		2012
Cost of sales	$	4	$	16	$	11
Selling, general and administrative expenses		848		974		566
Stock-based compensation expense before income tax benefits	$	852	$	990	$	577

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)		Aggregate Intrinsic Value
Options outstanding at March 31, 2011		1,328,937		$	12.62
Granted		30,000			5.24
Exercised		(7,500	)		2.67
Forfeited		(3,000	)		8.87
Options outstanding at March 31, 2012		1,348,437		$	12.44
Granted		327,500			3.58
Exercised		-			-
Forfeited		(196,937	)		10.00
Options outstanding at March 31, 2013		1,479,000		$	10.80
Granted		511,000			8.00
Exercised		-			-
Forfeited		(297,250	)		9.85
Options outstanding at March 31, 2014		1,692,750		$	10.12		6.2	$	982
Exercisable at March 31, 2014		945,500		$	12.18		4.3	$	346
Vested and expected to vest at March 31, 2014		1,606,829		$	10.27		6.0	$	928

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

			2014
			Outstanding						Exercisable
					Weighted Average		Weighted Average				Weighted Average
Range of Exercise Prices per Common Share			Options		Remaining Contractual Life (Years)		Exercise Price Per Common Share		Options		Exercise Price Per Common Share
$2.62	-	$10.97		1,022,500		8.0	$	7.38		357,750	$	8.12
$ 10.98	-	$ 19.36		573,550		3.4	$	13.06		491,050	$	13.26
$ 19.37	-	$ 23.27		96,700		3.1	$	21.72		96,700	$	21.72
$   2.62	-	$ 23.27		1,692,750		6.2	$	10.12		945,500	$	12.18

			2013
			Outstanding						Exercisable
					Weighted Average		Weighted Average				Weighted Average
Range of Exercise Prices per Common Share			Options		Remaining Contractual Life (Years)		Exercise Price Per Common Share		Options		Exercise Price Per Common Share
$2.62	-	$10.97		724,250		6.9	$	7.04		328,937	$	8.57
$ 10.98	-	$ 19.36		640,550		4.5	$	13.11		495,800	$	13.46
$ 19.37	-	$ 23.27		114,200		4.2	$	21.72		114,200	$	21.72
$   2.62	-	$ 23.27		1,479,000		5.6	$	10.80		938,937	$	12.75

Schedule of Nonvested Share Activity [Table Text Block]

	Shares			Weighted Average Grant Date Fair Value
Non-vested shares at April 1, 2013		540,063		$	4.09
Granted		511,000			4.37
Forfeited		(90,000	)		3.11
Vested		(213,813	)		5.04
Non-vested shares at March 31, 2014		747,250		$	4.13

Employee Stock Ownership Plan (ESOP) Disclosures [Table Text Block]

	1989 Non- Qualified Option Plan			1994 Stock Incentive Plan			1996 Non- Employee Stock Option Plan			Total
Authorized by Directors and Stockholders		3,975,000			3,525,000			750,000			8,250,000
Options previously exercised		(3,214,687	)		(2,025,187	)		(100,000	)		(5,339,874	)
Restricted stock previously granted		-			(93,750	)		-			(93,750	)
Options outstanding		(436,000	)		(1,051,750	)		(205,000	)		(1,692,750	)
Remaining for future issuance		324,313			354,313			445,000			1,123,626