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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
CURRENT ASSETS:    
Trade receivables, allowances $ 1,297 $ 893
STOCKHOLDERS’ EQUITY:    
Preferred stock shares authorized (in shares) 5,000,000 5,000,000
Preferred stock shares issued (in shares) 0 0
Common stock par value (in USD per share)
Common stock shares authorized (in shares) 100,000,000 100,000,000
Common stock shares issued (in shares) 44,267,000 43,614,000
Common stock shares outstanding (in shares) 44,267,000 43,614,000
Other    
OTHER ASSETS:    
Intangibles, accumulated amortization $ 26,603 $ 22,480
Developed technology    
OTHER ASSETS:    
Intangibles, accumulated amortization $ 38,497 $ 27,982