Note 9 - Leases - Future Minimum Lease Payments (Details) $ in Thousands	Mar. 31, 2023 USD ($)
2023	$ 147
2024	34
Total minimum lease payments	181
Less imputed interest	(2)
Accounts Payable and Accrued Liabilities and Other Noncurrent Liabilities [Member]
Total operating lease liability	179
Accounts Payable and Accrued Liabilities [Member]
Accounts payable and accrued liabilities	147
Other Noncurrent Liabilities [Member]
Other long-term liabilities	$ 32