Consolidated Statements of Operations - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Revenues	$ 73,664,000	$ 79,017,000	$ 109,338,000
Costs and expenses:
Cost of sales	45,107,000	43,889,000	62,521,000
Selling, general and administrative	31,116,000	35,432,000	36,375,000
Research and development	4,273,000	1,459,000	2,442,000
Goodwill and intangible assets impairment	1,425,000	23,400,000	0
Total Costs and Expenses	81,921,000	104,180,000	101,338,000
Operating (loss) income	(8,257,000)	(25,163,000)	8,000,000
Interest expense	(27,000)	(125,000)	(56,000)
Interest income	21,000	29,000	58,000
Other expense	(360,000)	(544,000)	(137,000)
(Loss) Income before taxes	(8,623,000)	(25,803,000)	7,865,000
Income tax (expense) benefit	(3,757,000)	8,078,000	(2,764,000)
Net (loss) income	$ (12,380,000)	$ (17,725,000)	$ 5,101,000
Net (loss) income per common share:
Basic (in dollars per share)	$ (0.54)	$ (0.78)	$ 0.23
Diluted (in dollars per share)	$ (0.54)	$ (0.78)	$ 0.23
Weighted-average number of common shares outstanding:
Basic (in shares)	23,101	22,782	22,286
Diluted (in shares)	23,101	22,782	22,579