Note 4 - Summary of Significant Accounting Policies - Operating Lease Expenses and Supplemental Information (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2023 |
Jun. 30, 2022 |
Jun. 30, 2023 |
Jun. 30, 2022 |
|
| Long-term operating lease contracts | $ 128 | $ 103 | $ 261 | $ 193 |
| Short-term operating lease contracts | 8 | 14 | 14 | 29 |
| Total | $ 136 | $ 117 | 275 | 222 |
| Operating cash flows used for operating leases (US$’000) | 264 | 178 | ||
| Right-of-use assets obtained in exchange for new lease liabilities (US$’000) | $ 0 | $ 259 | ||
| Weighted-average remaining lease term (Year) | 5 years 6 months 3 days | 6 years 21 days | 5 years 6 months 3 days | 6 years 21 days |
| Weighted-average discount rate | 6.00% | 6.00% | 6.00% | 6.00% |