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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts receivable $ 601 $ 217
Accumulated amortization, Intangible assets $ 17,380 $ 14,050
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 2,000,000 2,000,000
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 150,000,000 100,000,000
Common stock, shares issued 53,165,000 45,742,000
Common stock, shares outstanding 53,165,000 45,742,000
Treasury stock, shares 0 2,436,000