Statement of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]
Net revenues	$ 88,080	$ 71,186
Cost of goods sold	63,080	50,049
Gross profit	25,000	21,137
Operating expenses:
Research, development and engineering	7,250	7,687
Selling, general and administrative	10,764	10,043
Amortization of acquired intangible assets	1,707	246
Total operating expenses	19,721	17,976
Operating income	5,279	3,161
Other income (expense):
Interest income	47	39
Interest expense	(410)	(212)
Other income (expense), net	208	(83)
Income before income tax provision	5,124	2,905
Provision for income tax	(1,549)	(926)
Net income	$ 3,575	$ 1,979
Net income per share:
Basic	$ 0.11	$ 0.06
Diluted	$ 0.11	$ 0.06
Cash dividends per common share	$ 0.03	$ 0.03
Weighted average shares used in per share calculation:
Basic	31,379	30,948
Diluted	32,075	31,635