Note 11 - Income Taxes - Components of Net Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Obsolete inventory	$ 21,881	$ 21,881
Deferred tax assets, accrued vacation	35,933	35,872
Accrued bonuses		5,593
Stock-based compensation	2,407,591	1,970,789
Lease obligation	3,791	10,601
Intangible assets, net	449,001	508,289
Contribution, carryforward	541	735
Net operating loss carryforwards	7,118,178	4,505,111
Other	997
Valuation allowance	(10,034,122)	(7,048,088)
Deferred tax asset	3,791	10,783
Other		(182)
Right-of-use asset	(3,791)	(10,601)
Net deferred tax asset