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 period at Dec. 31, 2017	$ 55	$ 22,401	$ 57,495	$ 30,993	$ 9,751	$ (579)	$ (7,133)
Cumulative effect of adoption of updated accounting guidance for equity financial instruments at January 1, 2018 at Dec. 31, 2017				9,825	(9,825)
Reclassification of certain tax effects from accumulated other comprehensive income at January 1, 2018 at Dec. 31, 2017				(2,100)	2,100
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)				(1,839)				$ (1,839)
Other comprehensive income (loss), net of tax					(8,455)			(8,455)
Dividends on common stock				(407)
Dividends accrued on preferred stock				(199)
Restricted stock grants, net of forfeitures			(88)			135	(47)
Amortization of unearned compensation						122
Purchase of shares for treasury	0	0					(360)
Net shares acquired related to employee share-based compensation plans							(197)
Issuance of shares under stock plans	0	0	9				10
Balance, end of period at Jun. 30, 2018	55	22,401	57,416	36,273	(6,429)	(322)	(7,727)	$ 101,667
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared on common stock (in dollars per share)								$ (0.02)
Balance, beginning of period at Mar. 31, 2018	55	22,401	57,431	33,188	(3,618)	(387)	(7,346)
Cumulative effect of adoption of updated accounting guidance for equity financial instruments at January 1, 2018 at Mar. 31, 2018				0	0
Reclassification of certain tax effects from accumulated other comprehensive income at January 1, 2018 at Mar. 31, 2018				0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)				3,185				$ 3,185
Other comprehensive income (loss), net of tax					(2,811)			(2,811)
Dividends on common stock				0
Dividends accrued on preferred stock				(100)
Restricted stock grants, net of forfeitures			(20)			20	0
Amortization of unearned compensation						45
Purchase of shares for treasury	0	0					(281)
Net shares acquired related to employee share-based compensation plans							(107)
Issuance of shares under stock plans	0	0	5				7
Balance, end of period at Jun. 30, 2018	55	22,401	57,416	36,273	(6,429)	(322)	(7,727)	$ 101,667
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared on common stock (in dollars per share)								$ 0
Balance, beginning of period at Dec. 31, 2018	55	22,401	57,414	37,208	(7,535)	(186)	(7,985)	$ 101,372
Cumulative effect of adoption of updated accounting guidance for equity financial instruments at January 1, 2018 at Dec. 31, 2018				0	0
Reclassification of certain tax effects from accumulated other comprehensive income at January 1, 2018 at Dec. 31, 2018				0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)				(264)				(264)
Other comprehensive income (loss), net of tax					12,262			12,262
Dividends on common stock				(403)
Dividends accrued on preferred stock				(199)
Restricted stock grants, net of forfeitures			24			(71)	47
Amortization of unearned compensation						107
Purchase of shares for treasury	0	0					(71)
Net shares acquired related to employee share-based compensation plans							(49)
Issuance of shares under stock plans	0	0	6				9
Balance, end of period at Jun. 30, 2019	55	22,401	57,444	36,342	4,727	(150)	(8,049)	$ 112,770
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared on common stock (in dollars per share)								$ (0.02)
Balance, beginning of period at Mar. 31, 2019	55	22,401	57,417	40,868	(1,082)	(128)	(8,044)
Cumulative effect of adoption of updated accounting guidance for equity financial instruments at January 1, 2018 at Mar. 31, 2019				0	0
Reclassification of certain tax effects from accumulated other comprehensive income at January 1, 2018 at Mar. 31, 2019				0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)				(4,426)				$ (4,426)
Other comprehensive income (loss), net of tax					5,809			5,809
Dividends on common stock				0
Dividends accrued on preferred stock				(100)
Restricted stock grants, net of forfeitures			24			(71)	47
Amortization of unearned compensation						49
Purchase of shares for treasury	0	0					(22)
Net shares acquired related to employee share-based compensation plans							(35)
Issuance of shares under stock plans	0	0	3				5
Balance, end of period at Jun. 30, 2019	$ 55	$ 22,401	$ 57,444	$ 36,342	$ 4,727	$ (150)	$ (8,049)	$ 112,770
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared on common stock (in dollars per share)								$ 0