Note 10 - Leases - Future Minimum Lease Payments (Details) $ in Thousands	Jun. 30, 2022 USD ($)
2022	$ 104
2023	174
2024	59
Total minimum lease payments	337
Less imputed interest	(8)
Accounts Payable and Accrued Liabilities and Other Noncurrent Liabilities [Member]
Total operating lease liability	329
Accounts Payable and Accrued Liabilities [Member]
Accounts payable and accrued liabilities	208
Other Noncurrent Liabilities [Member]
Other long-term liabilities	$ 121