CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - 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 period 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 (loss)				321				$ 321
Other comprehensive income (loss), net of tax					9,313			9,313
Dividends on common stock				0
Dividends accrued on preferred stock				(299)
Restricted stock grants, net of forfeitures			(377)			61	316
Amortization of unearned compensation						370
Net shares acquired related to employee share-based compensation plans							(91)
Issuance of shares under stock plans			(7)				14
Balance, end of period at Sep. 30, 2020	55	$ 22,401	57,436	36,042	19,772	(350)	(7,341)	$ 128,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared on common stock per share (in dollars per share)								$ 0
Balance, beginning of period (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)		3,737
Restricted stock grants, net of forfeitures (in shares)		(15,000)
Balance, end of period (in shares) at Sep. 30, 2020		20,414,279
Balance, beginning of period at Jun. 30, 2020	55	$ 22,401	57,435	34,266	17,464	(466)	(7,261)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)				1,876				$ 1,876
Other comprehensive income (loss), net of tax					2,308			2,308
Dividends on common stock				0
Dividends accrued on preferred stock				(100)
Restricted stock grants, net of forfeitures			0			0	0
Amortization of unearned compensation						116
Net shares acquired related to employee share-based compensation plans							(81)
Issuance of shares under stock plans			1				1
Balance, end of period at Sep. 30, 2020	55	$ 22,401	57,436	36,042	19,772	(350)	(7,341)	$ 128,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared on common stock per share (in dollars per share)								$ 0
Balance, beginning of period (in shares) at Jun. 30, 2020		20,454,001
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net shares acquired under employee share-based compensation plans (in shares)		(40,718)
Issuance of shares under stock plans (in shares)		996
Restricted stock grants, net of forfeitures (in shares)		0
Balance, end of period (in shares) at Sep. 30, 2020		20,414,279
Balance, beginning of period 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]
Net income (loss)				1,616				1,616
Other comprehensive income (loss), net of tax					(6,011)			(6,011)
Dividends on common stock				(408)
Dividends accrued on preferred stock				(299)
Restricted stock grants, net of forfeitures			0			0	0
Amortization of unearned compensation						184
Net shares acquired related to employee share-based compensation plans							(153)
Issuance of shares under stock plans			4				2
Balance, end of period at Sep. 30, 2021	55	$ 22,401	57,441	48,699	18,989	(100)	(7,490)	$ 139,995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared on common stock per share (in dollars per share)								$ 0.02
Balance, beginning of period (in shares) at Dec. 31, 2020		20,415,243						20,415,243
Increase (Decrease) in Stockholders' Equity [Roll Forward]
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 period (in shares) at Sep. 30, 2021		20,378,576						20,378,576
Balance, beginning of period at Jun. 30, 2021	55	$ 22,401	57,439	49,714	20,277	(150)	(7,361)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)				(915)				$ (915)
Other comprehensive income (loss), net of tax					(1,288)			(1,288)
Dividends on common stock				0
Dividends accrued on preferred stock				(100)
Restricted stock grants, net of forfeitures			0			0	0
Amortization of unearned compensation						50
Net shares acquired related to employee share-based compensation plans							(129)
Issuance of shares under stock plans			2				0
Balance, end of period at Sep. 30, 2021	$ 55	$ 22,401	$ 57,441	$ 48,699	$ 18,989	$ (100)	$ (7,490)	$ 139,995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared on common stock per share (in dollars per share)								$ 0
Balance, beginning of period (in shares) at Jun. 30, 2021		20,410,763
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net shares acquired under employee share-based compensation plans (in shares)		(32,668)
Issuance of shares under stock plans (in shares)		481
Restricted stock grants, net of forfeitures (in shares)		0
Balance, end of period (in shares) at Sep. 30, 2021		20,378,576						20,378,576