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Note 14 - Common Shares - Share Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Stock Repurchased and Retired During Period, Shares (in shares) | 0 | 0 | 70,238
Stock Repurchased and Retired During Period, Value | $ 0 | $ 0 | $ 3,281
Average price per share (in dollars per share) | $ 0 | $ 0 | $ 46.70
Number of shares (in shares) | 3,053 | 45,824 | 48,013
Aggregate market value of shares (in thousands) | $ 197 | $ 3,669 | $ 2,957
Average price per share (in dollars per share) | $ 64.67 | $ 80.07 | $ 61.58

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