XML 16 R4.htm IDEA: XBRL DOCUMENT v3.19.2
CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Jun. 30, 2019
Dec. 31, 2018
Stockholders' equity:    
Common stock, shares authorized 1,000,000,000 1,000,000,000
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, shares issued 164,123,186 160,612,852
Common stock, shares outstanding 164,123,186 160,612,852