Consolidated Statements Of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Revenue:
Product	$ 26,315	$ 26,112
Contract	1,675	4,448
Total revenue, net	27,990	30,560
Cost of goods sold:
Product	18,573	13,526
Contract	991	2,089
Total cost of goods sold	19,564	15,615
Gross profit	8,426	14,945
Operating expenses:
Research and development	5,023	4,738
Selling, general and administrative	8,605	8,584
Total operating expenses	13,628	13,322
(Loss) Income from operations	(5,202)	1,623
Other income (expense):
Interest expense, net	(31)	(29)
Other income, net	50	43
Total other income (expense), net	19	14
(Loss) income before income tax	(5,183)	1,637
Income tax expense (benefit)	8,884	(615)
Net (loss) income	(14,067)	2,252
Less net income allocated to participating securities		755
Net (loss) income allocated to common shares	$ (14,067)	$ 1,497
(Loss) income per share, basic	$ (0.60)	$ 0.06
(Loss) income per share, diluted	$ (0.60)	$ 0.06
Weighted average number of shares outstanding:
Basic	23,639,554	23,486,463
Diluted	23,639,554	25,382,125
Cash dividends declared per common share		$ 0.10