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Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share for in the Money Potential Common Shares (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]        
Average market price during the period $ 6.55 $ 4.27 $ 6.91 $ 4.04
Potential common shares excluded from EPS 916,158 916,158 916,158 916,158
Stock Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Potential common shares excluded from EPS 22,493 22,493 22,493 22,493
Warrant Derivatives [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Potential common shares excluded from EPS 2,781,314 633,784 2,781,314 633,784