Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues	$ 20,911	$ 19,021	$ 46,123	$ 41,643
Costs and expenses:
Cost of sales	11,880	10,553	25,100	22,019
Selling, general and administrative	7,874	7,966	16,868	15,917
Gain on revaluation of ACT liability		(758)		(758)
Research and development	969	315	1,475	717
	20,723	18,076	43,443	37,895
Operating income	188	945	2,680	3,748
Interest expense	(49)	(38)	(74)	(78)
Interest income	40	4	40	5
Other expense	(72)	(155)	(51)	(195)
Income before income taxes	107	756	2,595	3,480
Income tax expense	(39)	(326)	(984)	(1,711)
Net income	$ 68	$ 430	$ 1,611	$ 1,769
Net income per common share:
Basic (in Dollars per share)	$ 0.00	$ 0.02	$ 0.07	$ 0.07
Diluted (in Dollars per share)	$ 0.00	$ 0.02	$ 0.07	$ 0.07
Weighted-average number of common shares outstanding:
Basic (in Shares)	23,107,000	24,269,000	23,349,000	24,242,000
Diluted (in Shares)	23,984,000	24,909,000	24,122,000	24,900,000