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Consolidated Statements of Operations - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Revenue $ 13,586 $ 12,708
Cost of goods sold 5,124 5,006
Gross profit 8,462 7,702
Operating expenses:    
Sales and marketing 2,622 2,737
Research and product development 1,941 2,241
General and administrative 2,000 1,968
Total operating expenses 6,563 6,946
Operating income 1,899 756
Other income, net 104 81
Income before income taxes 2,003 837
Provision for income taxes 731 352
Net income $ 1,272 $ 485
Basic earnings per common share $ 0.14 $ 0.05
Diluted earnings per common share $ 0.13 $ 0.05
Basic weighted average shares outstanding 9,100,107 9,082,546
Diluted weighted average shares outstanding 9,508,479 9,558,941
Other comprehensive income:    
Unrealized gain on available-for-sale securities, net of tax $ 55 $ 73
Change in foreign currency translation adjustment (180) 0
Comprehensive income $ 1,147 $ 558