Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (unaudited) (Parenthetical)

v3.10.0.1
Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts $ 6,303 $ 8,978
Common Stock, par value (dollars per share) $ 0.001 $ 0.001
Common Stock, shares authorized (in shares) 120,000,000 120,000,000
Common Stock, shares issued (in shares) 33,755,514 33,134,101
Common Stock, shares outstanding (in shares) 33,755,514 33,134,101
Preferred Stock, par value (dollars per share) $ 0.001 $ 0.001
Preferred Stock, shares authorized (in shares) 10,000,000 10,000,000
Preferred Stock, shares issued (in shares) 0 0
Preferred Stock, shares outstanding (in shares) 0 0