Note 10 - Net Loss Per Share (Details Textual) - shares shares in Millions |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2022 |
Jun. 30, 2021 |
Jun. 30, 2022 |
Jun. 30, 2021 |
|
Securities Excluded from Computation of Earnings Per Share Amount, Performance Conditions (in shares) | 6.2 | 2.6 | 6.2 | 2.6 |