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Note 1 - Basis of Presentation - Stock Option Activity (Details) - Share-Based Payment Arrangement, Option [Member]
shares in Thousands
9 Months Ended
Sep. 30, 2022
$ / shares
shares
Outstanding (in shares) | shares 55
Outstanding, weighted average option exercise price (in dollars per share) $ 53.79
Outstanding, weighted average grant date fair value (in dollars per share) $ 36.95
Cancelled/Forfeited (in shares) | shares (44)
Cancelled/Forfeited, weighted average option exercise price (in dollars per share) $ 55.79
Cancelled/Forfeited, weighted average grant date fair value (in dollars per share) $ 38.05
Expired (in shares) | shares (4)
Expired, weighted average option exercise price (in dollars per share) $ 40.43
Expired, weighted average grant date fair value (in dollars per share) $ 29.23
Outstanding (in shares) | shares 7
Outstanding, weighted average option exercise price (in dollars per share) $ 0
Outstanding, weighted average grant date fair value (in dollars per share) $ 0