Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Net revenues	$ 79,484	$ 75,133	$ 238,751	$ 237,437
Cost of goods sold	52,545	51,104	162,363	161,794
Gross profit	26,939	24,029	76,388	75,643
Operating expenses:
Research, development and engineering	6,703	7,280	22,461	22,767
Selling, general and administrative	10,276	9,158	30,454	29,595
Amortization of acquisition-related intangible assets	750	1,329	2,463	4,282
Impairment of acquisition-related intangible assets	1,391		1,391
Total operating expenses	19,120	17,767	56,769	56,644
Operating income	7,819	6,262	19,619	18,999
Other income (expense):
Interest income	81	54	196	140
Interest expense	(646)	(432)	(1,896)	(1,030)
Other income (expense), net	(110)	290	1,291	(1,510)
Income before income tax provision	7,144	6,174	19,210	16,599
Provision for income tax	(2,044)	(3,888)	(7,156)	(8,055)
Net income	$ 5,100	$ 2,286	$ 12,054	$ 8,544
Net income per share:
Basic (in dollars per share)	$ 0.16	$ 0.07	$ 0.38	$ 0.27
Diluted (in dollars per share)	0.16	0.07	0.38	0.26
Cash dividends per common share (in dollars per share)		$ 0.04	$ 0.04	$ 0.115
Weighted average shares used in per share calculation:
Basic (in shares)	31,558	31,487	31,484	31,626
Diluted (in shares)	32,209	32,343	32,119	32,483