Note 10 - Business Risk and Credit Risk Concentration Involving Cash (Details Textual) - Customer Concentration Risk [Member]	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Revenue Benchmark [Member]
Number Of Customers	2	3	2	3
Accounts Receivable [Member]
Number Of Customers			2	2