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Note 3 - Debt Securities (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

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

		*September 30, 2023*
		*Amortized*				*Unrealized*				*Unrealized*				*Fair*
		*Cost*				*Gains*				*Losses*				*Value*
(Amounts in thousands)
U.S. Agency securities		$	5,750			$	-			$	(9	)		$	5,741
U.S. Treasury securities			146,929				-				(2,009	)			144,920
Municipal securities			19,951				-				(550	)			19,401
Corporate notes			28,559				-				(2,310	)			26,249
Agency mortgage-backed securities			96,102				-				(17,081	)			79,021
Total		$	297,291			$	-			$	(21,959	)		$	275,332

		*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 securities			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]

		*September 30, 2023*
		*Amortized*
(Amounts in thousands)		*Cost*				*Fair Value*
Available-for-sale debt securities
Due within one year		$	157,238			$	155,191
Due after one year but within five years			43,357				40,550
Due after five years but within ten years			594				570
			201,189				196,311
Agency mortgage-backed securities			96,102				79,021
Total debt securities available for sale		$	297,291			$	275,332

Schedule of Unrealized Loss on Investments [Table Text Block]

		*September 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		$	5,741			$	(9	)		$	-			$	-			$	5,741			$	(9	)
U.S. Treasury securities			11,301				(39	)			132,373				(1,970	)			143,674				(2,009	)
Municipal securities			13,165				(261	)			5,391				(289	)			18,556				(550	)
Corporate notes			-				-				26,249				(2,310	)			26,249				(2,310	)
Agency mortgage-backed securities			4,545				(167	)			74,476				(16,914	)			79,021				(17,081	)
Total		$	34,752			$	(476	)		$	238,489			$	(21,483	)		$	273,241			$	(21,959	)

		*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 securities			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*								*Nine Months Ended*
		*September 30,*								*September 30,*
		*2023*				*2022*				*2023*				*2022*
(Amounts in thousands)
Gross realized gains		$	-			$	-			$	7			$	-
Gross realized losses			-				-				(28	)			-
Net gain (loss) on sale of securities		$	-			$	-			$	(21	)		$	-