CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Net sales	$ 22,628	$ 20,170	$ 57,660	$ 58,004
Cost of sales	14,189	11,540	37,003	34,034
Gross profit	8,439	8,630	20,657	23,970
Selling, general, and administrative expenses	3,198	3,910	9,739	10,945
Engineering expense	2,516	1,733	6,245	7,713
Operating income	2,725	2,987	4,673	5,312
Interest expense	8	17	41	209
Other expense – net	23	22	74	68
Income before incomes taxes	2,694	2,948	4,558	5,035
Income tax provision	1,024	1,239	1,732	2,115
Net income	$ 1,670	$ 1,709	$ 2,826	$ 2,920
Earnings per common share:
Basic net income per share	$ 0.17	$ 0.18	$ 0.29	$ 0.31
Diluted net income per share	$ 0.17	$ 0.18	$ 0.29	$ 0.31
Weighted-average basic shares outstanding	9,667,000	9,518,000	9,625,000	9,503,000
Weighted-average diluted shares outstanding	9,797,000	9,592,000	9,733,000	9,563,000