Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

v3.8.0.1
Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Accounts receivable, allowance $ 4,580 $ 5,352
Redeemable convertible preferred stock, shares issued 480,000 480,000
Redeemable convertible preferred stock, shares outstanding 480,000 480,000
Common stock, shares issued 255,044,043 250,867,462
Common stock, shares outstanding 255,044,043 250,867,462