Note 5 - Revenues - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Balance at Beginning of Period	$ 1,037	$ 1,110	$ 582	$ 567
Balance at Beginning of Period			3,500
Unbilled Membership Dues	227	219	1,610	1,747
Billings	(450)	(484)	(1,378)	(1,469)
Balance at End of Period	814	845	814	845
Balance at End of Period	4,600		4,600
Balance at End of Period	814	845	814	845
Deferred Membership Dues [Member]
Balance at Beginning of Period	5,734	5,863	3,524	3,443
Billings	623	609	6,494	6,842
Revenue Recognized	(1,770)	(1,801)	(5,431)	(5,614)
Balance at End of Period	4,587	4,671	4,587	4,671
Customer Advance Deposits [Member]
Balance at Beginning of Period	1,649	1,311	1,565	1,223
Billings	708	853	1,330	2,062
Revenue Recognized	(884)	(859)	(1,422)	(1,980)
Balance at End of Period	$ 1,473	$ 1,305	$ 1,473	$ 1,305