CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net sales	$ 15,464	$ 23,421	$ 35,032	$ 37,834
Cost of sales	10,051	13,592	22,814	22,494
Gross profit	5,413	9,829	12,218	15,340
Selling, general, and administrative expenses	3,808	3,763	6,541	7,035
Engineering expense	1,910	2,511	3,729	5,980
Operating income (loss)	(305)	3,555	1,948	2,325
Interest expense	15	19	33	192
Other expense – net	30	21	51	46
Income (loss) before incomes taxes	(350)	3,515	1,864	2,087
Income tax provision (benefit)	(133)	1,476	708	876
Net income (loss)	$ (217)	$ 2,039	$ 1,156	$ 1,211
Earnings (loss) per common share:
Basic net income (loss) per share	$ (0.02)	$ 0.21	$ 0.12	$ 0.13
Diluted net income (loss) per share	$ (0.02)	$ 0.21	$ 0.12	$ 0.13
Weighted-average basic shares outstanding	9,644,000	9,499,000	9,608,000	9,496,000
Weighted-average diluted shares outstanding	9,644,000	9,540,000	9,705,000	9,549,000