Note 8 - Income Taxes - Deferred Tax Assets (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Net operating loss carryforwards	$ 916,200	$ 1,934,300
Accrued commissions	9,000	102,600
Accrued vacation	21,200	24,500
Fixed assets	(23,500)	(24,100)
Other	3,700	6,400
Subtotal	926,600	2,043,700
Valuation allowance	(926,600)	(2,043,700)
Total

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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