Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net revenues	$ 78,629	$ 80,257	$ 159,267	$ 162,304
Cost of goods sold	53,174	54,245	109,818	110,690
Gross profit	25,455	26,012	49,449	51,614
Operating expenses:
Research, development and engineering	7,848	7,804	15,758	15,487
Selling, general and administrative	10,140	9,801	20,178	20,437
Amortization of acquisition-related intangible assets	696	1,374	1,713	2,953
Total operating expenses	18,684	18,979	37,649	38,877
Operating income	6,771	7,033	11,800	12,737
Other income (expense):
Interest income	53	39	115	86
Interest expense	(615)	(284)	(1,250)	(598)
Other income (expense), net	586	(1,010)	1,401	(1,800)
Income before income tax provision	6,795	5,778	12,066	10,425
Provision for income tax	(2,860)	(2,505)	(5,112)	(4,167)
Net income	$ 3,935	$ 3,273	$ 6,954	$ 6,258
Net income per share:
Basic (in dollars per share)	$ 0.12	$ 0.10	$ 0.22	$ 0.20
Diluted (in dollars per share)	0.12	0.10	0.22	0.19
Cash dividends per common share (in dollars per share)		$ 0.04	$ 0.04	$ 0.075
Weighted average shares used in per share calculation:
Basic (in shares)	31,490	31,651	31,447	31,769
Diluted (in shares)	32,145	32,380	32,074	32,627