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Note 3 - Debt Securities (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

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

		*March 31, 2023*
		*Amortized*				*Unrealized*				*Unrealized*				*Fair*
		*Cost*				*Gains*				*Losses*				*Value*
(Amounts in thousands)
U.S. Agency securities		$	1,500			$	-			$	(9	)		$	1,491
U.S. Treasury Notes			174,052				3				(3,369	)			170,686
Municipal securities			23,012				25				(80	)			22,957
Corporate notes			31,543				-				(1,764	)			29,779
Agency mortgage-backed securities			94,780				4				(11,428	)			83,356
Total		$	324,887			$	32			$	(16,650	)		$	308,269

		*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]

		*March 31, 2023*
		*Amortized*
(Amounts in thousands)		*Cost*				*Fair Value*
Available-for-sale debt securities
Due within one year		$	157,230			$	154,233
Due after one year but within five years			70,343				68,145
Due after five years but within ten years			2,534				2,535
			230,107				224,913
Agency mortgage-backed securities			94,780				83,356
Total debt securities available for sale		$	324,887			$	308,269

Schedule of Unrealized Loss on Investments [Table Text Block]

		*March 31, 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		$	1,491			$	(9	)		$	-			$	-			$	1,491			$	(9	)
U.S. Treasury Notes			54,208				(554	)			106,906				(2,815	)			161,114				(3,369	)
Municipal securities			7,463				(60	)			1,169				(20	)			8,632				(80	)
Corporate notes			2,972				(28	)			26,807				(1,736	)			29,779				(1,764	)
Agency mortgage-backed securities			10,009				(513	)			73,212				(10,915	)			83,221				(11,428	)
Total		$	76,143			$	(1,164	)		$	208,094			$	(15,486	)		$	284,237			$	(16,650	)

		*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	)