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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Part 3 (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax [Abstract]        
Reversal of reserve for lapsed statute of limitations $ 0 $ 73,000    
Income tax penalties and interest accrued for unrecognized tax position $ 21,000      
Tax Rate [Abstract]        
Federal corporate tax rate 21.00% 21.00% 21.00% 34.00%
Federal [Member] | Minimum [Member]        
Income Tax [Abstract]        
Tax year open to examination 2017      
Federal [Member] | Maximum [Member]        
Income Tax [Abstract]        
Tax year open to examination 2020      
State [Member] | Minimum [Member]        
Income Tax [Abstract]        
Tax year open to examination 2017      
State [Member] | Maximum [Member]        
Income Tax [Abstract]        
Tax year open to examination 2020