XML 25 R4.htm IDEA: XBRL DOCUMENT v3.19.1
CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Dec. 31, 2018
Dec. 31, 2017
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 160,612,852 149,379,491
Common stock, shares outstanding 160,612,852 149,379,491