Note 3 - Investments in Securities - Schedule of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Amortized Cost, Available-for-sale	$ 36,820	$ 34,080
Gross Unrealized Gains, Available-for-sale	331	324
Gross Unrealized Losses, Available-for-sale	(85)	(87)
Allowance for Credit Losses, Available-for-sale	0	0
Investments in available-for-sale securities, at fair value	37,066	34,317
Collateralized Mortgage-Backed Securities [Member]
Amortized Cost, Available-for-sale	6,316	6,411
Gross Unrealized Gains, Available-for-sale	25	51
Gross Unrealized Losses, Available-for-sale	(4)	(3)
Allowance for Credit Losses, Available-for-sale	0	0
Investments in available-for-sale securities, at fair value	6,337	6,459
Collateralized Mortgage Obligations [Member]
Amortized Cost, Available-for-sale	12,271	10,937
Gross Unrealized Gains, Available-for-sale	12	48
Gross Unrealized Losses, Available-for-sale	(48)	(37)
Allowance for Credit Losses, Available-for-sale	0	0
Investments in available-for-sale securities, at fair value	12,235	10,948
Corporate Debt Securities [Member]
Amortized Cost, Available-for-sale	18,233	16,732
Gross Unrealized Gains, Available-for-sale	294	225
Gross Unrealized Losses, Available-for-sale	(33)	(47)
Allowance for Credit Losses, Available-for-sale	0	0
Investments in available-for-sale securities, at fair value	$ 18,494	$ 16,910

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
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-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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