Note 8 - Income Taxes - Components of Income Tax Expense (Benefit) from Continuing Operations (Details) - USD ($)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Current income taxes:
Federal	$ 0	$ 0
State	0	0
Current tax (benefit)	(401,945)	(311,189)
Book in excess of tax depreciation	(419,523)	(61,808)
Allowance for doubtful accounts	0	752
Work in progress	(44,862)	848,000
Net operating loss carryover	(389,616)	(344,870)
Valuation allowance	844,826	(507,935)
Deferred compensation	(52,165)	(6,508)
Accrued vacation	(16,707)	(2)
Reserve for obsolete inventory	14,847	86,308
Deferred tax expense (benefit)	(63,200)	13,937
Total tax expense (benefit)	(465,145)	(297,252)
Danish Ministry of Taxation [Member]
Current income taxes:
Danish	$ (401,945)	$ (311,189)

Amount of deferred income tax expense (benefit) pertaining to accrued vacation.

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The amount of deferred income tax expense (benefit) attributable to work in progress.

+ References

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Amount of deferred income tax expense (benefit) pertaining to deferred compensation.

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Amount of deferred income tax expense (benefit) pertaining for valuation allowance.

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Amount of deferred income tax expense (benefit) pertaining to allowance for doubtful accounts.

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Deferred tax expense reserve for obsolete inventory.

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Net operating loss carryover.

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Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

+ References

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Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible depreciation.

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