Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS' DEFICIT - Schedule of Equity Structure (Details)

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STOCKHOLDERS' DEFICIT - Schedule of Equity Structure (Details) - $ / shares
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Equity [Abstract]      
Common shares, par value (in dollars per share) $ 0.001 $ 0.001  
Common shares authorized (in shares) 1,000,000,000.0 1,000,000,000.0  
Common stock issued (in shares) 67,842,204 67,512,167  
Common stock, shares outstanding (in shares) 67,390,980 67,060,943 67,038,304
Preferred stock authorized (in shares) 100,000,000 100,000,000  
Preferred stock shares issued (in shares) 0 0  
Preferred stock, shares outstanding (in shares) 0 0