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Note 11 - Related Party Transactions (Details Textual) - USD ($) $ in Thousands			3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 12, 2022	Nov. 04, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Prepaid Expense, Current, Total			$ 3,671		$ 3,671		$ 5,598
Mr. McAfee [Member]
Accrued Liabilities, Current, Total			0		0		300
Stock Issued During Period, Shares, Issued for Services (in shares)	180,000
Various Board Members [Member]
Share-Based Payment Arrangement, Expense			100	$ 100	300	$ 200
Employment Agreements and Expense Reimbursements [Member] \| Mr. McAfee [Member]
Related Party Transaction, Amounts of Transaction					400
Prepayments [Member] \| Mr. McAfee [Member]
Related Party Transaction, Amounts of Transaction					200
Prepaid Expense, Current, Total			$ 100		100
Guarantee Fee [Member] \| Mr. McAfee [Member]
Related Party Transaction, Amounts of Transaction		$ 400
One-time Guarantee Fee [Member] \| Mr. McAfee [Member]
Related Party Transaction, Amounts of Transaction	$ 2,000
Board Compensation Fees [Member] \| Various Board Members [Member]
Related Party Transaction, Amounts of Transaction					$ 300		$ 200