Note 14 - Employee Benefit Plans - Net Periodic Benefit Cost Recognized in Consolidated Statements of Operations (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Selling, general and administrative expenses	$ 5,000	$ 4,000
Other expense, net	562,000	614,000
Total	567,000	618,000
Selling, General and Administrative Expenses [Member]
Selling, general and administrative expenses	$ 5,000	$ 4,000