Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Accounts Receivable, after Allowance for Credit Loss			$ 78,600
Cash, Uninsured Amount	$ 11,600	$ 3,500
Depreciation	7,900	6,700	5,000
Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Asset	$ 0
Standard Warranty Extended Term for Exceptions (Year)	10 years
Defined Contribution Plan, Cost	$ 2,500	2,400	2,300
Research and Development Expense	$ 3,100	$ 3,300	$ 3,500
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares (in shares)	1,982,000	2,024,000	2,087,000
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ 300	$ (600)	$ 100
Gain (Loss), Foreign Currency Transaction, before Tax	$ 1,000	$ (400)	$ 300
Maximum [Member]
Intangible Asset, Finite-Lived, Useful Life (Year)	20 years
Standard Warranty Term (Year)	5 years
Minimum [Member]
Intangible Asset, Finite-Lived, Useful Life (Year)	5 years
Standard Warranty Term (Year)	1 year
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant, and Equipment, Useful Life (Year)	15 years