v3.20.1
Quarterly Results (unaudited) - Additional Information (Detail) - shares
3 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2019
Dec. 31, 2018
Options to Purchase Common Stock [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Dilutive impact of options to purchase common shares 426,860    
Number of anti-dilutive securities excluded from computation of earnings per share 2,400,000    
Restricted Stock [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Dilutive impact of options to purchase common shares 7,038    
Weighted Average [Member] | Options to Purchase Common Stock [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Number of anti-dilutive securities excluded from computation of earnings per share 100,000 5,335,850 3,351,132
Weighted Average [Member] | Warrants to Purchase Common Stock [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Number of anti-dilutive securities excluded from computation of earnings per share 300,000 917,562 317,562