Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Revenues	$ 21,482	$ 33,555	$ 60,333	$ 85,131
Costs and expenses:
Cost of sales	11,582	18,455	34,069	48,734
Selling, general and administrative	8,080	9,304	25,783	27,069
Research and development	379	461	848	1,824
Costs and Expenses	20,041	28,220	60,700	77,627
Operating income (loss)	1,441	5,335	(367)	7,504
Interest expense	(33)	(19)	(96)	(29)
Interest income	6	14	23	43
Other expense	(285)	(82)	(354)	(291)
Income (loss) before income taxes	1,129	5,248	(794)	7,227
Income tax benefit (expense)	63	(1,768)	180	(2,532)
Net income (loss)	$ 1,192	$ 3,480	$ (614)	$ 4,695
Net income (loss) per common share:
Basic (in Dollars per share)	$ 0.05	$ 0.16	$ (0.03)	$ 0.21
Diluted (in Dollars per share)	$ 0.05	$ 0.15	$ (0.03)	$ 0.21
Weighted-average number of common shares outstanding:
Basic (in Shares)	22,835	22,376	22,764	22,229
Diluted (in Shares)	23,216	22,534	22,764	22,458