Note 2 - Revenue from Contracts with Customers - Deferred Costs of Revenue Balances Included in Prepaid Expenses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Balance, deferred costs of revenue	$ 453,607	$ 294,115
Deferred costs added - maintenance	66,624	799,742
Deferred costs expensed	(472,324)	(640,250)
Deferred costs added - deliverables	41,161
Balance, deferred costs of revenue	$ 89,068	$ 453,607