XML 17 R3.htm IDEA: XBRL DOCUMENT v3.10.0.1
CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
VIEs    
Cash and cash equivalents $ 151,063 $ 170,385
Stockholders' equity    
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, shares authorized 90,000,000 90,000,000
Common stock, shares issued 50,715,518 51,448,753
Common stock, shares outstanding 50,715,518 51,448,753
VIEs    
VIEs    
Cash and cash equivalents $ 3,127 $ 60,256