Note 10 - Accounts Receivable (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Accounts Receivable, Allowance for Credit Loss, Current	$ 9,000		$ 9,000		$ 9,000
Total Transfer Capacity, Undivided Interests to Investors under Receivables Securitization Facility	800,000		$ 800,000
Receivables Securitization Facility, Duration (Year)			3 years
Value Outstanding, Undivided Interest Held by Investors Under Receivables Securitization Facility	0		$ 0		0
Receivables Securitization Facility, Issued			800,000
Receivables Securitization Facility, Repayments			800,000
Accounts Receivable, Supporting Undivided Investor Held Interest	1,700,000		1,700,000		1,700,000
Interest Expense, Operating and Nonoperating	314,000	$ 334,000	$ 957,000	$ 1,009,000
Receivables Securitization Facility, Maturity Date			Jul. 31, 2025
Asset-Backed Securities, Securitized Loans and Receivables [Member]
Accounts Receivable, from Securitization, Default or Dilution Ratio			1.00%
Interest Expense, Operating and Nonoperating	2,000	$ 4,000	$ 7,000	$ 8,000
Maximum [Member]
Total Transfer Capacity, Undivided Interests to Investors under Receivables Securitization Facility	800,000		800,000
Other Assets [Member]
Accounts Receivable, Allowance for Credit Loss, Noncurrent	$ 81,000		$ 81,000		$ 71,000