Note 2 - Significant Accounting Policies and Consolidated Financial Statement Components - Summary of Troubled Debt Restructurings (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Amount of TDRs on non-accrual status (in thousands)		$ 43,300	$ 33,200
Point-of-Sale [Member]
Number of TDRs		10,682	6,095
Amount of TDRs on non-accrual status (in thousands)		$ 14,468	$ 4,885
Carrying value of TDRs (in thousands)		$ 8,864	$ 3,333
Number of accounts		2,835	6,903
Loan balance at time of charge off (in thousands)		$ 4,397	$ 9,634
Point-of-Sale [Member] | Performing Financial Instruments [Member]
Carrying value of TDRs (in thousands)	[1]	6,754	2,525
Point-of-Sale [Member] | Nonperforming Financial Instruments [Member]
Carrying value of TDRs (in thousands)	[1]	$ 2,110	$ 808
Point-of-Sale [Member] | Extended Maturity [Member]
Number of TDRs		2,788	2,759
Amount of TDRs on non-accrual status (in thousands)		$ 5,118	$ 3,782
Direct-to-Consumer [Member]
Number of TDRs		14,553	3,584
Amount of TDRs on non-accrual status (in thousands)		$ 13,037	$ 1,942
Carrying value of TDRs (in thousands)		$ 7,312	$ 1,363
Number of accounts		3,339	5,415
Loan balance at time of charge off (in thousands)		$ 3,545	$ 4,963
Direct-to-Consumer [Member] | Performing Financial Instruments [Member]
Carrying value of TDRs (in thousands)	[1]	6,106	1,191
Direct-to-Consumer [Member] | Nonperforming Financial Instruments [Member]
Carrying value of TDRs (in thousands)	[1]	$ 1,206	$ 172
Direct-to-Consumer [Member] | Extended Maturity [Member]
Number of TDRs		2,854	1,111
Amount of TDRs on non-accrual status (in thousands)		$ 3,104	$ 955

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