Note 2 - Significant Accounting Policies and Condensed Consolidated Financial Statement Components (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Payment for Acquisition, Loan and Lease, Held-for-Investment	$ 51,200	$ 55,300	$ 112,200	$ 120,300
Financing Receivable, Deferred Commitment Fee	$ 18,100		$ 18,100		$ 17,900
Weighted Average Remaining Accretion Period of Deferred Revenue (Month)			24 months		26 months
Effective Income Tax Rate Reconciliation, Percent	15.60%	22.30%	18.50%	23.10%
Unrecognized Tax Benefits, Interest on Income Taxes Expense			$ 93	$ 1,140