Note 5 - Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Jun. 30, 2023
Property and equipment, gross	$ 3,838	$ 5,496
Less: accumulated depreciation and amortization	(2,871)	(3,681)
Property and equipment, net	967	1,815
Manufacturing Equipment [Member]
Property and equipment, gross	1,191	2,433
Office Equipment, Furniture and Other [Member]
Property and equipment, gross	1,018	1,125
Leasehold Improvements [Member]
Property and equipment, gross	887	999
Lab Equipment [Member]
Property and equipment, gross	742	832
Asset under Construction [Member]
Property and equipment, gross	$ 0	$ 107