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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Condensed Consolidated Balance Sheets    
Allowance for doubtful accounts $ 390 $ 184
Preferred stock, par value $ 0.0001 $ 0.0001
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred stock, shares issued 0 0
Common stock, par value $ 0.0001 $ 0.0001
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 32,888,000 32,884,000
Common stock, shares outstanding 30,016,000 31,203,000