Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.8.0.1
Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Statement Of Financial Position [Abstract]    
Accounts receivable, allowance for doubtful accounts $ 13,700 $ 13,699
Property and equipment, accumulated depreciation $ 40,530 $ 27,102
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 250,000,000 250,000,000
Common stock, shares issued 80,462,574 78,571,158
Common stock, shares outstanding 80,462,574 78,571,158
Redeemable Convertible Preferred Stock, par value $ 0.001 $ 0.001
Redeemable Convertible Preferred Stock, shares authorized 50,000,000 50,000,000
Redeemable Convertible Preferred Stock, shares issued 6,864,000 6,600,000
Redeemable Convertible Preferred Stock, shares outstanding 6,864,000 6,600,000