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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		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue from contracts with customers		$ 13,786	$ 7,835	$ 25,681	$ 14,759
Credit and Debit Card [Member]
Revenue from contracts with customers	[1]	4,783	5,003	9,447	9,619
Servicing Income [Member]
Revenue from contracts with customers		2,039	825	3,574	1,721
Service Charges and Other Customer Related Fees [Member]
Revenue from contracts with customers		6,964	2,007	12,660	3,419
Credit and Other Investments [Member]
Revenue from contracts with customers		13,580	7,628	25,258	14,342
Credit and Other Investments [Member] | Credit and Debit Card [Member]
Revenue from contracts with customers	[1]	4,783	5,003	9,447	9,619
Credit and Other Investments [Member] | Servicing Income [Member]
Revenue from contracts with customers		1,849	636	3,184	1,341
Credit and Other Investments [Member] | Service Charges and Other Customer Related Fees [Member]
Revenue from contracts with customers		6,948	1,989	12,627	3,382
Auto Finance [Member]
Revenue from contracts with customers		206	207	423	417
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		190	189	390	380
Auto Finance [Member] | Service Charges and Other Customer Related Fees [Member]
Revenue from contracts with customers		$ 16	$ 18	$ 33	$ 37
[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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