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Note 15 - Share-based Compensation - Restricted Stock Unit/Awards Activity (Details) - Restricted Stock Units (RSUs) [Member]
$ / shares in Units, shares in Thousands, $ in Thousands
 6 Months Ended
Jun. 30, 2022
USD ($)
$ / shares
shares
Outstanding, number of shares (in shares) | shares 2,170
Outstanding, weighted average fair value (in dollars per share) $ 11.15
Outstanding, aggregate intrinsic value | $ $ 11,156
Granted, number of shares (in shares) | shares 1,679
Granted, weighted average fair value (in dollars per share) $ 2.03
Granted, aggregate intrinsic value | $ $ 3,064
Released, number of shares (in shares) | shares (400)
Released, weighted average share price on date of release (in dollars per share)
Released, weighted average fair value (in dollars per share) $ 12.34
Released, aggregate intrinsic value | $ $ 1,383
Cancelled/Forfeited, number of shares (in shares) | shares (99)
Cancelled/Forfeited, weighted average fair value (in dollars per share) $ 10.79
Cancelled/Forfeited, aggregate intrinsic value | $ $ 153
Outstanding, number of shares (in shares) | shares 3,350
Outstanding, weighted average fair value (in dollars per share) $ 6.45
Outstanding, aggregate intrinsic value | $ $ 5,193
Vested and expected to vest, number of shares (in shares) | shares 3,350
Vested and expected to vest, weighted average fair value (in dollars per share) $ 6.45
Vested and expected to vest, aggregate intrinsic value | $ $ 5,193