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Income (loss) Per Common Share - Antidilutive Securities Excluded from Computation of Diluted Net Income (Loss) Per Common Share (Detail) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 370,077 2,653,193 2,962,373 2,602,181
Restricted Stock and Stock Units [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount   1,308,881 1,662,514 1,257,869
Stock Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 66,431 124,000 79,547 124,000
Series E Redeemable Preferred Stock [Member] | Embedded Derivative [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 303,646 303,646 303,646 303,646
Convertible Preferred Stocks [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount   916,666 916,666 916,666