Note 20 - Retirement Plans - Weighted-average Asset Allocation By Assets Category (Details)		Dec. 31, 2022	Dec. 31, 2021
Major US Plans [Member]
Asset allocations		100.00%	100.00%
Major US Plans [Member] | Equity Securities [Member]
Asset allocations		0.00%	5.00%
Target asset allocations		0.00%
Major US Plans [Member] | Debt Securities [Member]
Asset allocations		20.00%	11.00%
Major US Plans [Member] | Debt Securities [Member] | Minimum [Member]
Target asset allocations		18.00%
Major US Plans [Member] | Debt Securities [Member] | Maximum [Member]
Target asset allocations		24.00%
Major US Plans [Member] | Real Estate [Member]
Asset allocations		1.00%	1.00%
Target asset allocations		0.00%
Major US Plans [Member] | Cash and Cash Equivalents [Member]
Asset allocations		7.00%	5.00%
Major US Plans [Member] | Cash and Cash Equivalents [Member] | Minimum [Member]
Target asset allocations		0.00%
Major US Plans [Member] | Cash and Cash Equivalents [Member] | Maximum [Member]
Target asset allocations		10.00%
Major US Plans [Member] | Global Balanced Asset Allocation Funds [Member]
Asset allocations		0.00%	8.00%
Target asset allocations		0.00%
Major US Plans [Member] | Private Equity Funds [Member]
Asset allocations		30.00%	26.00%
Major US Plans [Member] | Private Equity Funds [Member] | Minimum [Member]
Target asset allocations		23.00%
Major US Plans [Member] | Private Equity Funds [Member] | Maximum [Member]
Target asset allocations		28.00%
Major US Plans [Member] | Hedge Funds [Member]
Asset allocations	[1]	42.00%	44.00%
Major US Plans [Member] | Hedge Funds [Member] | Minimum [Member]
Target asset allocations	[1]	46.00%
Major US Plans [Member] | Hedge Funds [Member] | Maximum [Member]
Target asset allocations	[1]	58.00%
Major Non-US Plans [Member]
Asset allocations		100.00%	100.00%
Major Non-US Plans [Member] | Equity Securities [Member]
Asset allocations		6.00%	6.00%
Major Non-US Plans [Member] | Equity Securities [Member] | Minimum [Member]
Target asset allocations		0.00%
Major Non-US Plans [Member] | Equity Securities [Member] | Maximum [Member]
Target asset allocations		10.00%
Major Non-US Plans [Member] | Debt Securities [Member]
Asset allocations		16.00%	17.00%
Major Non-US Plans [Member] | Debt Securities [Member] | Minimum [Member]
Target asset allocations		10.00%
Major Non-US Plans [Member] | Debt Securities [Member] | Maximum [Member]
Target asset allocations		20.00%
Major Non-US Plans [Member] | Real Estate [Member]
Asset allocations		2.00%	2.00%
Major Non-US Plans [Member] | Real Estate [Member] | Minimum [Member]
Target asset allocations		0.00%
Major Non-US Plans [Member] | Real Estate [Member] | Maximum [Member]
Target asset allocations		5.00%
Major Non-US Plans [Member] | Cash and Cash Equivalents [Member]
Asset allocations		4.00%	2.00%
Major Non-US Plans [Member] | Cash and Cash Equivalents [Member] | Minimum [Member]
Target asset allocations		0.00%
Major Non-US Plans [Member] | Cash and Cash Equivalents [Member] | Maximum [Member]
Target asset allocations		5.00%
Major Non-US Plans [Member] | Global Balanced Asset Allocation Funds [Member]
Asset allocations		0.00%	0.00%
Target asset allocations		0.00%
Major Non-US Plans [Member] | Private Equity Funds [Member]
Asset allocations		8.00%	7.00%
Major Non-US Plans [Member] | Private Equity Funds [Member] | Minimum [Member]
Target asset allocations		0.00%
Major Non-US Plans [Member] | Private Equity Funds [Member] | Maximum [Member]
Target asset allocations		10.00%
Major Non-US Plans [Member] | Hedge Funds [Member]
Asset allocations		4.00%	5.00%
Major Non-US Plans [Member] | Hedge Funds [Member] | Minimum [Member]
Target asset allocations		0.00%
Major Non-US Plans [Member] | Hedge Funds [Member] | Maximum [Member]
Target asset allocations		10.00%
Major Non-US Plans [Member] | Insurance Contracts [Member]
Asset allocations		60.00%	61.00%
Major Non-US Plans [Member] | Insurance Contracts [Member] | Minimum [Member]
Target asset allocations		25.00%
Major Non-US Plans [Member] | Insurance Contracts [Member] | Maximum [Member]
Target asset allocations		75.00%

[1] The 2022 target for hedge funds includes a policy allocation to U.S. government bonds that is obtained via treasury futures contracts.