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 (Loss) [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 loss				(8,087)				$ (8,087)
Other comprehensive loss, net of tax					(8,792)			(8,792)
Dividends on common stock				0
Dividends accrued on preferred stock				(99)
Restricted stock grants, net of forfeitures			(44)			98	(54)
Amortization of unearned compensation						99
Issuance of 539 and 1,204 shares, as of 2021 and 2020, respectively, under stock plans			1				2
Balance, end of year at Mar. 31, 2020	55	22,401	57,777	27,834	1,667	(584)	(7,632)	$ 101,518
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared on common stock per share (in dollars per share)								$ 0
Balance, beginning 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]
Net loss				(431)				(431)
Other comprehensive loss, net of tax					(10,956)			(10,956)
Dividends on common stock				(408)
Dividends accrued on preferred stock				(99)
Restricted stock grants, net of forfeitures			0			0	0
Amortization of unearned compensation						67
Issuance of 539 and 1,204 shares, as of 2021 and 2020, respectively, under stock plans			1				1
Balance, end of year at Mar. 31, 2021	$ 55	$ 22,401	$ 57,438	$ 46,852	$ 14,044	$ (217)	$ (7,338)	$ 133,235
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared on common stock per share (in dollars per share)								$ 0.02