CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Unearned Stock Grant Compensation [Member]	Treasury Stock [Member]	Total
Balance, beginning of year at Dec. 31, 2019	$ 55	$ 22,401	$ 57,820	$ 36,020	$ 10,459	$ (781)	$ (7,580)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				12,169				$ 12,169
Other comprehensive income (loss), net of tax					14,541			14,541
Dividends on common stock				0
Dividends accrued on preferred stock				(399)
Restricted stock grants, net of forfeitures			(376)			60	316
Amortization of unearned compensation						437
Net shares acquired related to employee share-based compensation plans							(91)
Issuance of shares under stock plans			(7)				16
Balance, end of year at Dec. 31, 2020	55	$ 22,401	57,437	47,790	25,000	(284)	(7,339)	$ 145,060
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared on common stock per share (in dollars per share)								$ 0
Balance, beginning of year (in shares) at Dec. 31, 2019		20,472,162
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net shares acquired under employee share-based compensation plans (in shares)		(46,620)
Issuance of shares under stock plans (in shares)		4,701
Restricted stock grants, net of forfeitures (in shares)		(15,000)
Balance, end of year (in shares) at Dec. 31, 2020		20,415,243						20,415,243
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				4,281				$ 4,281
Other comprehensive income (loss), net of tax					(7,312)			(7,312)
Dividends on common stock				(408)
Dividends accrued on preferred stock				(399)
Restricted stock grants, net of forfeitures			0			0	0
Amortization of unearned compensation						211
Net shares acquired related to employee share-based compensation plans							(153)
Issuance of shares under stock plans			4				2
Balance, end of year at Dec. 31, 2021	$ 55	$ 22,401	$ 57,441	$ 51,264	$ 17,688	$ (73)	$ (7,490)	$ 141,286
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared on common stock per share (in dollars per share)								$ 0.02
Net shares acquired under employee share-based compensation plans (in shares)		(38,147)
Issuance of shares under stock plans (in shares)		1,480
Restricted stock grants, net of forfeitures (in shares)		0
Balance, end of year (in shares) at Dec. 31, 2021		20,378,576						20,378,576