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Note 15 - Common Shares (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Feb. 23, 2024	Feb. 22, 2024	Feb. 09, 2024	Feb. 10, 2023	Feb. 09, 2023	Feb. 10, 2022	Feb. 09, 2021	Feb. 12, 2020
Common Stock, Shares Authorized (in shares)	250,000,000	250,000,000
Common Stock, Shares, Outstanding (in shares)	10,903,405	10,817,110
Stock Buyback Program 2024 [Member] | Subsequent Event [Member]
Stock Repurchase Program, Authorized Amount					$ 40	$ 40
Stock Buyback Program 2023 [Member]
Stock Repurchase Program, Authorized Amount								$ 40	$ 40
Stock Repurchased and Retired During Period, Shares (in shares)	0
Stock Buyback Program 2023 [Member] | Subsequent Event [Member]
Stock Repurchase Program, Authorized Amount							$ 40
Stock Buyback Program 2022 [Member]
Stock Repurchase Program, Authorized Amount										$ 40
Stock Repurchased and Retired During Period, Shares (in shares)		0
Stock Buyback Program 2021 [Member]
Stock Repurchase Program, Authorized Amount											$ 40
Stock Repurchased and Retired During Period, Shares (in shares)			0
Stock Buyback Program 2020 [Member]
Stock Repurchase Program, Authorized Amount												$ 40
Stock Buyback Program 2019 [Member]
Stock Repurchased and Retired During Period, Shares (in shares)				0

X

- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Number of shares that have been repurchased and retired during the period.

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