Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail)

v3.21.1
Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Summary Of Significant Accounting Policies [Line Items]    
Total potentially dilutive securities 7,137,741 7,206,004
Warrant Issued to Private Investors [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Total potentially dilutive securities 3,284,789 3,938,802
Employee Stock Option [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Total potentially dilutive securities 550,985 550,985
Restricted Stock Units (RSUs) [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Total potentially dilutive securities 1,851,254 2,048,540
Performance Share Units [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Total potentially dilutive securities 1,450,713 667,677