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Organization and 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
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Average market price during the period $ 6.50 $ 5.06 $ 4.93
Potential common shares excluded from EPS 916,158 1,112,293 1,112,293
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
Warrant Derivatives [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Potential common shares excluded from EPS 2,781,314 2,585,179 120,000