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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Statement of Financial Position [Abstract]    
Accounts receivable, allowance for doubtful accounts receivable $ 3,619 $ 794
Preferred stock, par value (in usd per share) $ 0.001 $ 0.001
Preferred stock, shares authorized 20,000,000 20,000,000
Common stock, par value (in usd per share) $ 0.001 $ 0.001
Common stock, shares authorized 80,000,000 80,000,000
Common stock, shares issued (in shares) 42,070,675 35,281,375
Common stock, shares outstanding (in shares) 41,811,288 35,249,749
Treasury stock, shares 259,387 31,626
Series A Convertible Preferred Stock    
Preferred stock, shares issued 14,808 29,172
Preferred stock, shares outstanding 14,808 29,172
Series A-1 Convertible Preferred Stock    
Preferred stock, shares issued 1,000 10,000
Preferred stock, shares outstanding 1,000 10,000
Series A-2 Convertible Preferred Stock    
Preferred stock, shares issued 14,000 14,000
Preferred stock, shares outstanding 14,000 14,000