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10. INCOME TAXES (Details 2) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]    
Deferred gain on sale-leaseback $ 0 $ 0
Various accruals and deferred timing differences 145,195 61,319
Prepaids (29,404) (52,309)
Depreciation (2,744,921) (2,493,973)
Inventory (621,969) (473,643)
Net noncurrent deferred tax liability (3,251,099) (2,958,606)
Valuation allowance 0 0
Net deferred tax liability $ (3,251,099) $ (2,958,606)