Note 12 - Common Share Repurchases (Details Textual) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Oct. 29, 2021
Stock Repurchased and Retired During Period, Value	$ 1,245	$ 361	$ 2,610
The Share Repurchase Program [Member]
Share Repurchase Program, Amount Authorized				$ 50,000
Stock Repurchased and Retired During Period, Shares (in shares)	30,038	10,848
Stock Repurchased and Retired During Period, Value	$ 1,200	$ 400
Share Repurchase Program, Available for Repurchase, Amount	$ 49,000

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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