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Note 2 - Significant Accounting Policies and Consolidated Financial Statement Components (Details Textual)
$ in Thousands
 1 Months Ended 12 Months Ended
Mar. 08, 2022
shares
Feb. 28, 2022
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Jan. 01, 2022
USD ($)
Nov. 30, 2005
Payments to Acquire Loans and Leases Held-for-investment, Total     $ 194,800 $ 185,000    
Loans and Leases Receivable, Deferred Income, Total     $ 29,281 $ 39,456    
Weighted Average Remaining Accretion Period of Deferred Revenue (Month)     15 months 14 months    
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Total     $ 20,400 $ 28,200    
Financing Receivable, Allowance for Credit Loss, Recovery     $ 16,900 $ 26,200    
Financing Receivable, Modifications, Number of Contracts     65,125 60,908    
Financing Receivable, Troubled Debt Restructuring     $ 70,000 $ 70,300    
Asset Impairment Charges, Total     0 0    
Gain (Loss) on Extinguishment of Debt, Total     (29,439) (0)    
Loans Receivable, Fair Value Disclosure     1,026,424 417,098    
Loans and Leases Receivable, Gross, Total     470,293 667,556    
Loans and Leases Receivable, Allowance, Ending Balance     57,201 124,961    
Accounts Payable and Accrued Liabilities, Total     42,287 41,731    
Retained Earnings (Accumulated Deficit), Ending Balance     $ 60,236 $ (117,666)    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares) | shares     526,015      
Stock Repurchased and Retired During Period, Shares (in shares) | shares     434,381 245,534    
Subsequent Event [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares) | shares   526,864        
Stock Repurchased and Retired During Period, Shares (in shares) | shares 451,407          
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Subsequent Event [Member]            
Loans and Leases Receivable, Deferred Income, Total         $ (15,000)  
Loans Receivable, Fair Value Disclosure         315,000  
Loans and Leases Receivable, Gross, Total         (375,000)  
Loans and Leases Receivable, Allowance, Ending Balance         (55,000)  
Accounts Payable and Accrued Liabilities, Total         (600)  
Deferred Income Tax Liabilities, Net, Total         2,000  
Retained Earnings (Accumulated Deficit), Ending Balance         $ 8,000  
Five Point Eight Seven Five Percent Convertible Senior Notes Due Two Thousand Thirty Five [Member] | Convertible Debt [Member]            
Debt Instrument, Interest Rate, Stated Percentage           5.875%
Extinguishment of Debt, Amount     $ 33,800      
Repayments of Convertible Debt     54,300      
Gain (Loss) on Extinguishment of Debt, Total     $ (29,400)      
Equity Method Investment to Acquire Portfolio of Credit Card Receivables [Member]            
Equity Method Investment, Ownership Percentage     66.70% 66.70%    
A Consumer Finance Technology Company [Member]            
Proceeds from Equity Method Investment, Distribution     $ 2,000      
Furniture and Fixtures [Member]            
Property, Plant and Equipment, Useful Life (Year)     5 years      
Computer Equipment [Member]            
Property, Plant and Equipment, Useful Life (Year)     3 years      
Receivables Recoveries from Employed Third-Party Collectors ][Member]            
Financing Receivable, Allowance for Credit Loss, Recovery     $ 8,700 $ 12,400    
Receivable Recoveries from Sales of Charged-Off Accounts to Third-Parties [Member]            
Financing Receivable, Allowance for Credit Loss, Recovery     $ 8,200 $ 13,800