Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Statement of Financial Position [Abstract]    
Accounts receivable, allowance for doubtful accounts $ 4,788 $ 4,739
Preferred stock, par value $ 0.0001 $ 0.0001
Preferred stock, shares authorized 1,000,000 1,000,000
Preferred stock, shares issued 0 0
Common stock, par value $ 0.0001 $ 0.0001
Common stock, shares authorized 200,000,000 200,000,000
Common stock, shares issued 22,631,950 22,506,421
Common stock, shares outstanding 22,434,259 22,308,730