Note 4 - Restricted and Unrestricted Cash - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Jun. 30, 2022
Statement [Line Items]
Cash and cash equivalents	$ 24,947	$ 22,314
Restricted cash	1,000	1,000
Total cash, cash equivalents, and restricted cash	$ 25,947	$ 23,314