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)

v3.20.1
Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Summary Of Significant Accounting Policies [Line Items]    
Total potentially dilutive securities 7,206,004 7,601,654
Warrant Issued to Private Investors [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Total potentially dilutive securities 3,938,802 4,702,354
Employee Stock Option [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Total potentially dilutive securities 550,985 576,293
Restricted Stock Units (RSUs) [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Total potentially dilutive securities 2,048,540 2,323,007
Performance Share Units [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Total potentially dilutive securities 667,677