Note 3 - Investments in Securities - Schedule of Available-for-Sale Securities in Unrealized Loss Position (Details) $ in Thousands	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	5	3
Securities available for sale, fair value, less than twelve months	$ 9,814	$ 5,564
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(80)	(52)
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-Sale, Unrealized Loss Position	9,814	5,564
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss	$ (80)	$ (52)
Collateralized Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	1	2
Securities available for sale, fair value, less than twelve months	$ 1,365	$ 4,126
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(10)	(38)
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-Sale, Unrealized Loss Position	1,365	4,126
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss	$ (10)	$ (38)
Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	2	1
Securities available for sale, fair value, less than twelve months	$ 2,967	$ 1,438
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(25)	(14)
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-Sale, Unrealized Loss Position	2,967	1,438
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss	$ (25)	$ (14)
Corporate Debt Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	2
Securities available for sale, fair value, less than twelve months	$ 5,482
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(45)
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Debt Securities, Available-for-Sale, Unrealized Loss Position	5,482
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss	$ (45)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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