v3.19.2
Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) (Unaudited) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2018
Statement Of Stockholders Equity [Abstract]    
Payments of stock issuance cost $ 3,093,489 $ 3,093,489