Note 10 - Benefit Plans (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
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	$ 118,000	$ 116,000
Defined Contribution Plan, Employer Profit Sharing Contribution Amount	50,000	100,000
Defined Contribution Plan, Employer Matching Contribution, Amount	$ 51,000	$ 12,000
Employee Stock Purchase Plan [Member]
Treasury Stock, Shares, Purchased by Employees (in shares)	27,143	30,247
Employee Stock Purchase Plan, Employer Matching Contribution Amount	$ 51,000	$ 52,000