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Note 2 - Significant Accounting Policies and Consolidated Financial Statement Components (Details Textual)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Jan. 01, 2022
USD ($)
Dec. 31, 2021
USD ($)
Retained Earnings (Accumulated Deficit), Total $ 230,627   $ 204,415    
Payment for Acquisition, Loan and Lease, Held-for-Investment 65,000 $ 56,500      
Financing Receivable, Deferred Commitment Fee $ 18,207   16,190    
Weighted Average Remaining Accretion Period of Deferred Revenue (Month) 27 months        
Financing Receivable, Modified, Number of Contracts   84,878      
Financing Receivable, Modified, Accumulated   $ 89,500      
Effective Income Tax Rate Reconciliation, Percent 23.80% (18.80%)      
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued $ (900)        
Loans Receivable, Fair Value Disclosure 1,795,589   1,817,976    
Financing Receivable, before Allowance for Credit Loss 113,367   105,267    
Financing Receivable, Allowance for Credit Loss 1,737 $ 1,600 1,643   $ 57,200
Accounts Payable and Accrued Liabilities, Total $ 42,006   $ 44,332    
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]          
Retained Earnings (Accumulated Deficit), Total       $ 8,600  
Financing Receivable, Deferred Commitment Fee       (15,600)  
Loans Receivable, Fair Value Disclosure       315,000  
Financing Receivable, before Allowance for Credit Loss       (375,700)  
Financing Receivable, Allowance for Credit Loss       (55,600)  
Accounts Payable and Accrued Liabilities, Total       (600)  
Deferred Income Tax Liabilities, Net       $ 2,500