Note 6 - Share-based Compensation - Compensation Cost (Details) - Selling, General and Administrative Expenses [Member] - USD ($) $ in Thousands |
3 Months Ended | |
---|---|---|
Mar. 31, 2024 |
Mar. 31, 2023 |
|
Share-based compensation | $ 1,513 | $ 1,056 |
Common Stock [Member] | ||
Share-based compensation | 100 | 100 |
Employee and Nonemployee Stock Option [Member] | ||
Share-based compensation | 113 | 94 |
Restricted Stock Units (RSUs) [Member] | ||
Share-based compensation | $ 1,300 | $ 862 |