Income Taxes - Deferred (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Jun. 30, 2024
Components of Deferred Tax Assets and Liabilities [Abstract]
Accounts receivable	$ 6	$ 8
Inventories	633	541
Accrued liabilities	675	676
Stock based compensation expense	474	452
Revenue reserves	520	439
Unrealized loss on marketable securities	69	136
Capitalized research and development cost	6,181	5,447
Other		2
Total Deferred Tax Assets	8,558	7,701
Deferred income tax assets, net of valuation allowance	8,558	7,701
Intangibles	(802)	(874)
Property, plant and equipment	(667)	(786)
Other deferred tax liabilities	(613)	(613)
Total Deferred Tax Liability	(2,082)	(2,273)
Net Deferred Tax Asset	$ 6,476	$ 5,428