Note 6 - Earnings (Loss) Per Share - Potentially Dilutive Securities Excluded from Diluted Net Income (Loss) per Share (Details) - shares shares in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2022 |
Sep. 30, 2021 |
Sep. 30, 2022 |
Sep. 30, 2021 |
|
| Total antidilutive share (in shares) | 4,909 | 4,590 | 4,587 | 4,596 |
| Share-Based Payment Arrangement, Option [Member] | ||||
| Total antidilutive share (in shares) | 1 | 3 | ||
| Restricted Stock Units (RSUs) [Member] | ||||
| Total antidilutive share (in shares) | 322 | 2 | 6 | |
| Convertible Debt Securities [Member] | ||||
| Total antidilutive share (in shares) | 4,587 | 4,587 | 4,587 | 4,587 |