Note 7 - Income Taxes - Significant Components of Deferred Tax Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021
Net operating loss	$ 5,166	$ 5,691
Capital loss carryover	299	299
Valuation adjustment on investment in iBio, Inc.	186	186
Depreciation	(157)	(158)
Inventory	149	128
Other	296	195
Valuation allowance	(1,141)	(3,073)
Total deferred tax asset, net	$ 4,798	$ 3,268

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards.

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