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Note 10 - Income Taxes - Deferred Tax Assets (Liabilities) (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Excess of tax over financial accounting	$ 708,825	$ 624,154
Vacation accrual	0	1,971
Reserve for excess and obsolete inventory	49,615	151,288
Accrued expenses	4,305	0
Accrued interest	13,125	0
Discount amortization	175,420	0
Deferred compensation	52,500	49,556
Net operating loss carryover	9,959,356	7,627,046
Excess of book over tax depreciation	(343,294)	(610,694)
Excess of book over tax work in progress	(587,469)	(817,131)
Valuation allowance	(10,257,162)	(7,331,357)
Deferred Tax Liabilities, Net, Total	(224,779)	(305,167)
Long-term deferred tax asset	0	0
Long-term deferred tax liability	(224,779)	(305,167)
Deferred Income Tax Liabilities, Net, Total	$ (224,779)	$ (305,167)

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