Note 10 - Leases - Future Minimum Lease Payments (Details) $ in Thousands	Mar. 31, 2022 USD ($)
2022	$ 156
2023	174
2024	59
Total minimum lease payments	389
Less imputed interest	(13)
Accounts Payable and Accrued Liabilities and Other Noncurrent Liabilities [Member]
Total operating lease liability	376
Accounts Payable and Accrued Liabilities [Member]
Accounts payable and accrued liabilities	207
Other Noncurrent Liabilities [Member]
Other long-term liabilities	$ 169