Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Sales	$ 67,822	$ 69,128
Cost of sales	45,078	47,273
Gross profit	22,744	21,855
Selling, general and administrative expenses	20,593	19,600
Research & development	3,287	3,607
Restructuring	200	0
Other (income) expense, net	(91)	65
Loss from operations	(1,245)	(1,417)
Interest expense	153	157
Interest income	(67)	(17)
Loss before income taxes	(1,331)	(1,557)
Income taxes	(86)	(149)
Net loss	$ (1,245)	$ (1,408)
Per share data:
Loss per share (in dollars per share)	$ (0.10)	$ (0.11)
Diluted loss per share (in dollars per share)	(0.10)	(0.11)
Cash dividends declared per share: (in dollars per share)	$ 0.02	$ 0.02