Note 14 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Tax Jurisdiction of Domicile [Extensible Enumeration]	Income Tax Jurisdiction, Domestic Federal [Member]	Income Tax Jurisdiction, Domestic Federal [Member]	Income Tax Jurisdiction, Domestic Federal [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Research	$ 4,800,000
Deferred Tax Asset, Interest Carryforward	1,820,000	$ 0
Deferred Tax Assets, Tax Deferred Expense, Interest, Increase (Decrease)	1,800,000
Unrecognized Tax Benefits	1,700,000	1,800,000	$ 600,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	400,000	300,000	300,000
Unrecognized Tax Benefits, Income Tax Penalties Accrued	200,000	200,000	200,000
Reserve for Unrecognized Tax Benefits, Including Penalties and Interest	2,300,000	2,300,000	1,100,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	2,300,000	2,300,000	600,000
Unrecognized Tax Benefits, Increase Resulting from Acquisition	0	1,149,000	0
Income Tax Reconciliation, Reserves and Accruals, Changes in Reserves for Uncertain Tax Positions	100,000	100,000	100,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense	72,000	12,000	17,000
Unrecognized Tax Benefits, Income Tax Penalties Expense	25,000	21,000	37,000
SRR Holdings Inc. [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic, Increase	4,800,000
Unrecognized Tax Benefits, Increase Resulting from Acquisition	900,000	1,100,000
Income Tax Jurisdiction, Domestic Federal [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Research		100,000
Income Tax Jurisdiction, Domestic State and Local [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Research	900,000	$ 0
Income Tax Jurisdiction, Domestic State and Local [Member] | Oregon Department of Revenue [Member]
Tax Credit Carryforward, Valuation Allowance			$ 100,000
Income Tax Jurisdiction, Domestic State and Local [Member] | SRR Holdings Inc. [Member]
Deferred Tax Assets, Operating Loss Carryforwards and Credits State and Local, Increase	$ 900,000