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)

v3.21.2
Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Summary Of Significant Accounting Policies [Line Items]        
Total potentially dilutive securities 6,323,445 6,945,580 6,323,445 6,945,580
Warrant Issued to Private Investors [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Total potentially dilutive securities 3,284,789 3,938,802 3,284,789 3,938,802
Employee Stock Option [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Total potentially dilutive securities 550,985 550,985 550,985 550,985
Restricted Stock Units (RSUs) [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Total potentially dilutive securities 1,530,216 1,822,116 1,530,216 1,822,116
Performance Share Units [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Total potentially dilutive securities 957,455 633,677 957,455 633,677