Note 9 - Related-party Transactions (Details Textual) - General and Administrative Expense [Member] - USD ($) $ in Thousands |
3 Months Ended | |
---|---|---|
Mar. 31, 2023 |
Mar. 31, 2022 |
|
Overhead Charged Related to Office Expenses [Member] | ||
Related Party Transaction, Amounts of Transaction | $ 64 | $ 64 |
Reimbursable Payroll Expense [Member] | ||
Related Party Transaction, Amounts of Transaction | $ 22 | $ 8 |