Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation - Performance Share Units - Additional Information (Detail)

v3.21.2
Stock Based Compensation - Performance Share Units - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Performance Share Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation-based payments $ 843,741 $ 0 $ 3,539,588 $ (88,348)
Employee service share-based compensation, nonvested awards, compensation not yet recognized, share-based awards other than options $ 733,189   $ 733,189  
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition     3 months 18 days  
2015 Performance Share Unit Plan [Member] | Employee [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period     1,465,713