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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		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue from contracts with customers		$ 16,993	$ 10,378	$ 42,674	$ 25,137
Credit and Debit Card [Member]
Revenue from contracts with customers	[1]	5,001	5,790	14,448	15,409
Servicing Income [Member]
Revenue from contracts with customers		3,057	1,122	6,631	2,843
Service Charges and Other Customer Related Fees [Member]
Revenue from contracts with customers		8,935	3,466	21,595	6,885
Credit and Other Investments [Member]
Revenue from contracts with customers		16,794	10,180	42,052	24,522
Credit and Other Investments [Member] | Credit and Debit Card [Member]
Revenue from contracts with customers	[1]	5,001	5,790	14,448	15,409
Credit and Other Investments [Member] | Servicing Income [Member]
Revenue from contracts with customers		2,871	943	6,055	2,284
Credit and Other Investments [Member] | Service Charges and Other Customer Related Fees [Member]
Revenue from contracts with customers		8,922	3,447	21,549	6,829
Auto Finance [Member]
Revenue from contracts with customers		199	198	622	615
Auto Finance [Member] | Credit and Debit Card [Member]
Revenue from contracts with customers	[1]	0	0	0	0
Auto Finance [Member] | Servicing Income [Member]
Revenue from contracts with customers		186	179	576	559
Auto Finance [Member] | Service Charges and Other Customer Related Fees [Member]
Revenue from contracts with customers		$ 13	$ 19	$ 46	$ 56
[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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