Note 10 - Related-party Transactions (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | |
---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
|
Overhead Charged Related to Office Expenses [Member] | General and Administrative Expense [Member] | ||
Related Party Transaction, Amounts of Transaction | $ 256 | $ 267 |
Reimbursable Payroll Expense [Member] | General and Administrative Expense [Member] | ||
Related Party Transaction, Amounts of Transaction | 8 | 7 |
Firms in Which Two Directors Were Principals or Partners [Member] | ||
Related Party Transaction, Amounts of Transaction | $ 0 | $ 604 |