Note 12 Employee Equity Incentive Plans (Tables)

3 Months Ended

Jun. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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

	Three Months Ended June 30,
Statement of Operations Classifications		2013		2012
	(unaudited)
Cost of goods sold	$	166	$	116
Research, development and engineering		208		281
Selling, general and administrative expenses		297		698
Stock-based compensation effect in income before taxes		671		1,095
Provision for income taxes (1)		208		383
Net stock-based compensation effects in net income	$	463	$	712
________________
(1) Estimated at a statutory income tax rate of 31% in fiscal year 2014 and 35% in fiscal year 2013.

Schedule of Employee Service Share-based Compensation, Fair Value Assumptions and Methodology [Table Text Block]

		Stock Options				Purchase Plan
		Three Months				Three Months
		Ended June 30,				Ended June 30,
		2013 (1)		2012		2013		2012
Weighted average estimated fair
	value of grant per share	$	na	$	5.47	$	2.60	$	3.67
Risk-free interest rate			na		0.9%		0.1%		0.1%
Expected term in years			na		6.34		0.5		0.5
Volatility			na		55.4%		38.5%		46.8%
Dividend yield			na		0%		0%		0%
(1) No stock options were granted during the quarter ended June 30, 2013.

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

			Weighted Average
		Number of	Exercise Price			Intrinsic Value (1)
		Shares	Per Share
						(000)
Balance at March 31, 2013		5,327,473	$	10.04
	Options granted	-	$	-
	Options exercised	(109,150)	$	8.04	$	338
	Options cancelled	(10,000)	$	9.02
	Options expired	(2,500)	$	12.13
Balance at June 30, 2013		5,205,823	$	10.08
Exercisable at June 30, 2013		4,108,073	$	9.83
Exercisable at March 31, 2013		4,065,473	$	9.74
(1) Represents the difference between the exercise price and the value of our common stock at the time of exercise.