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Note 2 - Significant Accounting Policies and Consolidated Financial Statement Components - Summary of Allowance for Uncollectible Loans and Fees Receivable (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Balance at beginning of period $ (1,643) $ (57,200)  
Provision for credit losses (704) (147)  
Charge-offs   400  
Recoveries   (300)  
Balance at end of period (1,737) (1,600)  
Loans, interest and fees receivable, gross 113,367   $ 105,267
Cumulative Effect, Period of Adoption, Adjustment [Member] | Adoption of Fair Value Under the CECL Standard [Member]      
Balance at beginning of period   55,800  
Cumulative Effect, Period of Adoption, Adjustment [Member] | Adoption of the CECL Standard [Member]      
Balance at beginning of period   (200)  
Automobile Loan [Member]      
Balance at beginning of period (1,600) (1,400)  
Provision for credit losses (700) (100)  
Charge-offs 1,000 400  
Recoveries (400) (300)  
Balance at end of period (1,700) (1,600)  
Balance at end of period individually evaluated for impairment 0   0
Balance at end of period collectively evaluated for impairment (1,700)   (1,600)
Loans, interest and fees receivable, gross 113,400   105,300
Loans, interest and fees receivable individually evaluated for impairment 0   0
Loans, interest and fees receivable collectively evaluated for impairment $ 113,400   $ 105,300
Automobile Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Adoption of Fair Value Under the CECL Standard [Member]      
Balance at beginning of period   0  
Automobile Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Adoption of the CECL Standard [Member]      
Balance at beginning of period   (200)  
Credit Card Receivable [Member]      
Balance at beginning of period   (43,400)  
Provision for credit losses   0  
Charge-offs   0  
Recoveries   0  
Balance at end of period   0  
Credit Card Receivable [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Adoption of Fair Value Under the CECL Standard [Member]      
Balance at beginning of period   43,400  
Credit Card Receivable [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Adoption of the CECL Standard [Member]      
Balance at beginning of period   0  
Other Unsecured Lending Products [Member]      
Balance at beginning of period   (12,400)  
Provision for credit losses   0  
Charge-offs   0  
Recoveries   0  
Balance at end of period   0  
Other Unsecured Lending Products [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Adoption of Fair Value Under the CECL Standard [Member]      
Balance at beginning of period   12,400  
Other Unsecured Lending Products [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Adoption of the CECL Standard [Member]      
Balance at beginning of period   $ 0