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10. INCOME TAXES (Details 2) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]    
Deferred gain on sale-leaseback $ 6,727 $ 15,368
Other 48,263 35,469
Prepaids (40,692) (27,909)
Depreciation (1,989,100) (1,487,036)
Inventory (225,425) (123,119)
Net noncurrent deferred tax liability (2,200,227) (1,587,227)
Valuation allowance 0 0
Net deferred tax liability $ (2,200,227) $ (1,587,227)