Note 6 - Unearned Revenue - Schedule of Unearned Revenue (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Unearned Revenue	$ 2,649,066	$ 2,595,085	$ 3,032,192
CALIFORNIA
Unearned Revenue	801,449	771,759	855,765
Central [Member]
Unearned Revenue	1,299,281	1,334,901	1,468,341
Mountain [Member]
Unearned Revenue	$ 548,336	$ 488,425	$ 708,086