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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Period Type:	duration

Note 14 - Stockholders' Equity (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Feb. 09, 2021	Feb. 13, 2020	Feb. 12, 2020	Feb. 14, 2019	Feb. 13, 2019
Stock Buyback Program 2021 [Member]
Stock Repurchase Program, Authorized Amount					$ 40
Stock Repurchased and Retired During Period, Shares (in shares)	0		0
Stock Buyback Program 2020 [Member]
Stock Repurchase Program, Authorized Amount						$ 40	$ 40
Stock Repurchased and Retired During Period, Shares (in shares)		0	0	101,816
Stock Repurchased and Retired During Period, Value				$ 5
Stock Buyback Program 2019 [Member]
Stock Repurchase Program, Authorized Amount								$ 40	$ 40
Stock Repurchased and Retired During Period, Shares (in shares)				0