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Note 2 - Significant Accounting Policies and Consolidated Financial Statement Components - Components of Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Revenue from contracts with customers		$ 11,895	$ 6,924
Credit and Debit Card [Member]
Revenue from contracts with customers	[1]	4,664	4,616
Servicing Income [Member]
Revenue from contracts with customers		1,535	896
Service Charges and Other Customer Related Fees [Member]
Revenue from contracts with customers		5,696	1,412
Credit and Other Investments [Member]
Revenue from contracts with customers		11,678	6,714
Credit and Other Investments [Member] | Credit and Debit Card [Member]
Revenue from contracts with customers	[1]	4,664	4,616
Credit and Other Investments [Member] | Servicing Income [Member]
Revenue from contracts with customers		1,335	705
Credit and Other Investments [Member] | Service Charges and Other Customer Related Fees [Member]
Revenue from contracts with customers		5,679	1,393
Auto Finance [Member]
Revenue from contracts with customers		217	210
Auto Finance [Member] | Credit and Debit Card [Member]
Revenue from contracts with customers	[1]	0	0
Auto Finance [Member] | Servicing Income [Member]
Revenue from contracts with customers		200	191
Auto Finance [Member] | Service Charges and Other Customer Related Fees [Member]
Revenue from contracts with customers		$ 17	$ 19
[1] Interchange revenue is presented net of customer reward expense.

X

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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