Note 2 - Significant Accounting Policies - Schedule of Changes in Contract Assets and Liabilities (Details)	3 Months Ended
	Sep. 30, 2021 USD ($)
Balance	$ 1,657,861
Amounts reclassified to accounts receivable	(318,296)
Other	(63,577)
Balance	1,275,988	[1]
Balance	1,755,341
Amounts billed but not recognized as revenue	965,635
Revenue recognized related to the opening balance of deferred revenue	(962,266)
Other	0
Balance	$ 1,758,710

[1] Contract asset balances for September 30, 2021 include a current and a long-term contract asset of $984,155 and $291,833, respectively.