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Income Taxes - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Income Tax [Line Items]      
Income tax expense (benefit) $ 61,833 $ (52,732)  
Federal corporate income tax rate 27.00%    
Valuation allowance $ 12,251,000   $ 12,533,000
Federal income tax net operating loss carry forward $ 12,700,000   $ 14,500,000
Net operating loss carry forwards expiration beginning year 2032    
Net operating loss carry forwards expiration ending year 2037    
State [Member]      
Income Tax [Line Items]      
Operating loss carryforwards $ 0 $ 0