Note 2 - Significant Accounting Policies and Consolidated Financial Statement Components - Summary of Troubled Debt Restructurings (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Amount of TDRs on non-accrual status (in thousands)		$ 70,000	$ 70,300
Point-of-Sale [Member]
Number of TDRs		14,919	12,394
Amount of TDRs on non-accrual status (in thousands)		$ 17,152	$ 14,537
Carrying value of TDRs (in thousands)		$ 11,173	$ 9,583
Number of accounts		3,119	3,065
Loan balance at time of charge off (in thousands)		$ 4,642	$ 4,352
Point-of-Sale [Member] | Performing Financial Instruments [Member]
Carrying value of TDRs (in thousands)	[1]	8,797	7,420
Point-of-Sale [Member] | Nonperforming Financial Instruments [Member]
Carrying value of TDRs (in thousands)	[1]	$ 2,376	$ 2,163
Point-of-Sale [Member] | Extended Maturity [Member]
Number of TDRs		812	2,788
Amount of TDRs on non-accrual status (in thousands)		$ 1,205	$ 4,662
Direct-to-Consumer [Member]
Number of TDRs		39,322	37,784
Amount of TDRs on non-accrual status (in thousands)		$ 25,154	$ 26,989
Carrying value of TDRs (in thousands)		$ 15,502	$ 14,287
Number of accounts		7,765	7,665
Loan balance at time of charge off (in thousands)		$ 6,455	$ 6,745
Direct-to-Consumer [Member] | Performing Financial Instruments [Member]
Carrying value of TDRs (in thousands)	[1]	13,387	11,855
Direct-to-Consumer [Member] | Nonperforming Financial Instruments [Member]
Carrying value of TDRs (in thousands)	[1]	$ 2,115	$ 2,432
Direct-to-Consumer [Member] | Extended Maturity [Member]
Number of TDRs		2,035	7,846
Amount of TDRs on non-accrual status (in thousands)		$ 1,553	$ 6,890

[1] "TDRs - Performing" include accounts that are current on all amounts owed, while "TDRs - Nonperforming" include all accounts with past due amounts owed.