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Note 12 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Net operating losses | $ 1,293,912 | $ 1,293,842
Inventory | 184,046 | 224,656
Reserves and accruals | 741,684 | 725,875
Amortization of intangible assets | 50,107 | 80,930
Share-based compensation | 280,396 | 398,165
Deferred revenue | 702,617 | 709,480
Lease liability | 570,446 | 520,830
Other | 267,050 | 191,174
Deferred income tax assets | 4,090,258 | 4,144,952
Less: valuation allowance | (1,022,191) | (1,022,135)
Deferred income tax assets, net of valuation allowance | 3,068,067 | 3,122,817
Amortization of goodwill | (197,245) | (199,172)
Property, plant and equipment | (156,289) | (81,065)
Other | (291,926) | (298,527)
Deferred income tax asset, net | $ 2,422,607 | $ 2,544,053

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