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Note 3 - Debt Securities (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]

		*June 30, 2023*
		*Amortized*				*Unrealized*				*Unrealized*				*Fair*
		*Cost*				*Gains*				*Losses*				*Value*
(Amounts in thousands)
U.S. Agency securities		$	7,250			$	-			$	(21	)		$	7,229
U.S. Treasury Notes			181,670				3				(3,167	)			178,506
Municipal securities			21,684				10				(245	)			21,449
Corporate notes			28,551				-				(2,088	)			26,463
Agency mortgage-backed securities			93,401				1				(12,676	)			80,726
Total		$	332,556			$	14			$	(18,197	)		$	314,373

		*December 31, 2022*
		*Amortized*				*Unrealized*				*Unrealized*				*Fair*
		*Cost*				*Gains*				*Losses*				*Value*
(Amounts in thousands)
U.S. Agency securities		$	1,500			$	—			$	(15	)		$	1,485
U.S. Treasury Notes			161,617				-				(4,353	)			157,264
Municipal securities			23,480				21				(192	)			23,309
Corporate notes			37,046				—				(2,189	)			34,857
Agency mortgage-backed securities			96,480				3				(13,049	)			83,434
Total		$	320,123			$	24			$	(19,798	)		$	300,349

Investments Classified by Contractual Maturity Date [Table Text Block]

		*June 30, 2023*
		*Amortized*
(Amounts in thousands)		*Cost*				*Fair Value*
Available-for-sale debt securities
Due within one year		$	188,484			$	185,298
Due after one year but within five years			48,727				46,419
Due after five years but within ten years			1,944				1,930
			239,155				233,647
Agency mortgage-backed securities			93,401				80,726
Total debt securities available for sale		$	332,556			$	314,373

Schedule of Unrealized Loss on Investments [Table Text Block]

		*June 30, 2023*
		*Less than 12 Months*								*12 Months or Longer*								*Total*
		*Fair*				*Unrealized*				*Fair*				*Unrealized*				*Fair*				*Unrealized*
		*Value*				*Losses*				*Value*				*Losses*				*Value*				*Losses*
(Amounts in thousands)
U.S. Agency securities		$	7,228			$	(21	)		$	-			$	-			$	7,228			$	(21	)
U.S. Treasury Notes			40,602				(84	)			126,686				(3,083	)			167,288				(3,167	)
Municipal securities			14,017				(189	)			1,403				(56	)			15,420				(245	)
Corporate notes			-				-				26,462				(2,088	)			26,462				(2,088	)
Agency mortgage-backed securities			3,335				(204	)			77,311				(12,472	)			80,646				(12,676	)
Total		$	65,182			$	(498	)		$	231,862			$	(17,699	)		$	297,044			$	(18,197	)

		*December 31, 2022*
		*Less than 12 Months*								*12 Months or Longer*								*Total*
		*Fair*				*Unrealized*				*Fair*				*Unrealized*				*Fair*				*Unrealized*
		*Value*				*Losses*				*Value*				*Losses*				*Value*				*Losses*
(Amounts in thousands)
U.S. Agency securities		$	1,485			$	(15	)		$	—			$	—			$	1,485			$	(15	)
U.S. Treasury Notes			157,264				(4,353	)			—				—				157,264				(4,353	)
Municipal securities			12,347				(192	)			—				—				12,347				(192	)
Corporate notes			32,368				(2,172	)			2,489				(17	)			34,857				(2,189	)
Agency mortgage-backed securities			64,993				(8,824	)			18,305				(4,225	)			83,298				(13,049	)
Total		$	268,457			$	(15,556	)		$	20,794			$	(4,242	)		$	289,251			$	(19,798	)

Realized Gain (Loss) on Investments [Table Text Block]

		*Three Months Ended*								*Six Months Ended*
		*June 30,*								*June 30,*
		*2023*				*2022*				*2023*				*2022*
(Amounts in thousands)
Gross realized gains		$	-			$	-			$	7			$	-
Gross realized losses			(28	)			-				(28	)			-
Net Gain (Loss) on sale of securities		$	(28	)		$	-			$	(21	)		$	-