Note 11 - Benefit Plans (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Defined Contribution Plan, Employer Matching Contribution, Percent for First Compensation Slab	100.00%
Percentage of First Compensation	3.00%
Defined Contribution Plan, Employer Matching Contribution, Percent for Next Compensation Slab	50.00%
Percentage of Next Compensation	2.00%
Defined Contribution Plan, Cost	$ 121,000	$ 109,000
Defined Contribution Plan, Employer Profit Sharing Contribution Amount	100,000	200,000
Defined Contribution Plan, Employer Matching Contribution, Amount	$ 12,000	$ 12,000
Employee Stock Purchase Plan [Member]
Treasury Stock, Shares, Purchased by Employees (in shares)	24,460	19,981
Employee Stock Purchase Plan, Employer Matching Contribution Amount	$ 49,000	$ 42,000