Note 2 - Significant Accounting Policies and Consolidated Financial Statement Components (Details Textual) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	Jan. 01, 2022 USD ($)
Retained Earnings (Accumulated Deficit), Total	$ 147,853		$ 147,853		$ 147,853	$ 60,236
Payments to Acquire Loans and Leases Held-for-investment, Total	52,800	$ 47,800	109,300	$ 98,300
Loans and Leases Receivable, Deferred Income	16,738		$ 16,738		16,738	$ 29,281
Weighted Average Remaining Accretion Period of Deferred Revenue (Month)			27 months			15 months
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	16,700		$ 16,700		$ 16,700	$ 20,400
Financing Receivable, Allowance for Credit Loss, Recovery	$ 200	$ 6,000	$ 500	$ 9,700
Financing Receivable, Modifications, Number of Contracts					98,880		52,686
Financing Receivable, Troubled Debt Restructuring, Postmodification					$ 106,700		$ 57,400
Effective Income Tax Rate Reconciliation, Percent, Total	20.40%	21.60%	2.00%	18.10%
Gain (Loss) on Extinguishment of Debt, Total	$ (0)	$ (5,448)	$ (0)	$ (13,255)
Loans Receivable, Fair Value Disclosure	1,616,875		1,616,875		1,616,875	1,026,424
Loans and Leases Receivable, Gross	104,563		104,563		104,563	470,293
Loans and Leases Receivable, Allowance	1,643		1,643		1,643	57,201
Accounts Payable and Accrued Liabilities, Total	46,971		46,971		$ 46,971	$ 42,287
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%		5.875%			5.875%
Extinguishment of Debt, Amount		$ 6,400		$ 21,100
Repayments of Convertible Debt		10,200		28,900
Gain (Loss) on Extinguishment of Debt, Total		(5,400)		(13,300)
Receivables Recoveries from Employed Third-Party Collectors ][Member]
Financing Receivable, Allowance for Credit Loss, Recovery	200	2,700	500	5,100
Receivable Recoveries from Sales of Charged-Off Accounts to Third-Parties [Member]
Financing Receivable, Allowance for Credit Loss, Recovery	$ 0	$ 3,300	$ 0	$ 4,600
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Retained Earnings (Accumulated Deficit), Total								$ 8,600
Loans and Leases Receivable, Deferred Income								(15,600)
Loans Receivable, Fair Value Disclosure								315,000
Loans and Leases Receivable, Gross								(375,700)
Loans and Leases Receivable, Allowance								(55,600)
Accounts Payable and Accrued Liabilities, Total								(600)
Deferred Income Tax Liabilities, Net								$ 2,500