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Note 10 - Income Taxes - Components of Income Tax Expense (Benefit) from Continuing Operations (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Current income taxes:    
Federal $ 0 $ 0
State 0 0
Current tax (benefit) 0 (401,945)
Book in excess of tax depreciation (309,719) (419,523)
Work in progress (174,093) (44,862)
Net operating loss carryover (2,667,221) (389,616)
Valuation allowance 2,811,619 844,826
Deferred compensation 31,500 (52,165)
Accrued interest 13,125 0
Discount amortization 175,420 0
Accrued vacation 4,305 (16,707)
Reserve for obsolete inventory 52,028 14,847
Deferred tax expense (benefit) (63,036) (63,200)
Total tax expense (benefit) (63,036) (465,145)
Danish Ministry of Taxation [Member]    
Current income taxes:    
Danish $ 0 $ (401,945)