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Note 14 - Stockholders' Equity (Details Textual) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Feb. 10, 2022	Feb. 09, 2021	Feb. 13, 2020	Feb. 12, 2020
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	$ 40
Stock Repurchased and Retired During Period, Shares (in shares)		0

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- Definition

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