Note 5 - Revenues - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Balance at Beginning of Period	$ 988	$ 1,037	$ 541	$ 582
Balance at Beginning of Period			3,500
Unbilled Membership Dues	188	227	1,464	1,610
Billings	(400)	(450)	(1,229)	(1,378)
Balance at End of Period	776	814	776	814
Balance at End of Period	4,600		4,600
Deferred Membership Dues [Member]
Balance at Beginning of Period	5,766	5,734	3,530	3,524
Billings	635	623	6,564	6,494
Revenue Recognized	(1,793)	(1,770)	(5,486)	(5,431)
Balance at End of Period	4,608	4,587	4,608	4,587
Customer Advance Deposits [Member]
Balance at Beginning of Period	1,656	1,649	1,688	1,565
Billings	966	708	2,148	1,330
Revenue Recognized	(1,124)	(884)	(2,338)	(1,422)
Balance at End of Period	$ 1,498	$ 1,473	$ 1,498	$ 1,473