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Consolidated Statements of Operations (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Revenues $ 24,907 $ 24,023 $ 71,030 $ 65,666
Costs and expenses:        
Cost of sales 14,671 13,050 39,771 35,069
Selling, general and administrative 8,064 7,701 24,932 23,618
Gain on revaluation of ACT liability       (758)
Research and development 569 358 2,044 1,075
23,304 21,109 66,747 59,004
Operating income 1,603 2,914 4,283 6,662
Interest expense (16) (47) (90) (125)
Interest income 16 14 56 19
Other expense (27) (57) (78) (252)
Income before income taxes 1,576 2,824 4,171 6,304
Income tax expense (382) (169) (1,366) (1,880)
Net income $ 1,194 $ 2,655 $ 2,805 $ 4,424
Net income per common share:        
Basic (in Dollars per share) $ 0.05 $ 0.11 $ 0.12 $ 0.18
Diluted (in Dollars per share) $ 0.05 $ 0.11 $ 0.12 $ 0.18
Weighted-average number of common shares outstanding:        
Basic (in Shares) 22,105,000 24,322,000 22,932,000 24,269,000
Diluted (in Shares) 23,022,000 24,850,000 23,749,000 24,881,000