Note 2 - Significant Accounting Policies - Schedule of Changes in Contract Assets and Liabilities (Details)	3 Months Ended
	Mar. 31, 2022 USD ($)
Balance	$ 996,609
Amounts reclassified to accounts receivable	(149,466)
Other	24,231
Balance	871,374	[1]
Balance	1,657,859
Amounts billed but not recognized as revenue	991,099
Revenue recognized related to the opening balance of deferred revenue	(1,106,938)
Other	0
Balance	$ 1,542,020

[1] Contract asset balances for March 31, 2022 include a current and a long-term contract asset of $665,322 and $206,052, respectively.