Note 6 - Unearned Revenue - Schedule of Unearned Revenue (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Unearned Revenue	$ 2,884,876	$ 2,595,085	$ 3,298,971
CALIFORNIA
Unearned Revenue	873,322	771,759	969,444
Central [Member]
Unearned Revenue	1,344,902	1,334,901	1,662,168
Mountain [Member]
Unearned Revenue	$ 666,652	$ 488,425	$ 667,359