Note 2 - Significant Accounting Policies - Contract with Customer assets and liabilities (Details)	6 Months Ended
	Dec. 31, 2023 USD ($)
Balance	$ 295,011
Balance	1,903,001
Revenue recognized during the period but not billed	0
Amounts billed but not recognized as revenue	885,218
Amounts reclassified to accounts receivable	(10,000)
Revenue recognized related to the opening balance of deferred revenue	(761,654)
Other	(26,779)
Balance	2,026,565
Balance	$ 258,232	[1]

[1] Contract asset balances for December 31, 2023 include a current and a long-term contract asset of $150,180 and $108,052, respectively.