Note 2 - Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2022
Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total	$ 440,087		$ 440,087		$ 649,433
Contract with Customer, Asset, after Allowance for Credit Loss, Noncurrent, Total	$ 108,052		$ 108,052		$ 108,052
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount				23,737
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 10.00	$ 10.00	$ 10.00	$ 10.00
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	23,737	23,737	23,737