Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2017	3,899,675
Balance at Dec. 31, 2017	$ 40	$ 106,875	$ (38,832)	$ (1,179)	$ (155)	$ 66,749
Comprehensive income:
Net (loss) income			1,065			1,065
Unrealized holding gain (loss) on available-for-sale securities, net of tax					(224)	(224)
Total comprehensive income			1,065		(224)	841
Common stock dividends			(38)			(38)
Share-based compensation expense		53				53
Vesting of restricted stock (in shares)	2,935
Balance (in shares) at Dec. 31, 2017	3,899,675
Balance at Dec. 31, 2017	$ 40	106,875	(38,832)	(1,179)	(155)	66,749
Balance (in shares) at Mar. 31, 2018	3,902,610
Balance at Mar. 31, 2018	$ 40	106,928	(37,805)	(1,179)	(379)	67,605
Balance (in shares) at Dec. 31, 2017	3,899,675
Balance at Dec. 31, 2017	$ 40	106,875	(38,832)	(1,179)	(155)	66,749
Comprehensive income:
Net (loss) income			2,101			2,101
Unrealized holding gain (loss) on available-for-sale securities, net of tax					(519)	(519)
Total comprehensive income			2,101		(519)	1,582
Common stock dividends			(77)			(77)
Share-based compensation expense		107				107
Balance (in shares) at Dec. 31, 2017	3,899,675
Balance at Dec. 31, 2017	$ 40	106,875	(38,832)	(1,179)	(155)	66,749
Comprehensive income:
Vesting of restricted stock
Balance (in shares) at Jun. 30, 2018	3,904,578
Balance at Jun. 30, 2018	$ 40	106,982	(36,808)	(1,179)	(674)	68,361
Balance (in shares) at Mar. 31, 2018	3,902,610
Balance at Mar. 31, 2018	$ 40	106,928	(37,805)	(1,179)	(379)	67,605
Comprehensive income:
Net (loss) income			1,036			1,036
Unrealized holding gain (loss) on available-for-sale securities, net of tax					(295)	(295)
Total comprehensive income			1,036		(295)	741
Common stock dividends			(39)			(39)
Share-based compensation expense		54				54
Vesting of restricted stock (in shares)	1,968
Balance (in shares) at Mar. 31, 2018	3,902,610
Balance at Mar. 31, 2018	$ 40	106,928	(37,805)	(1,179)	(379)	67,605
Balance (in shares) at Jun. 30, 2018	3,904,578
Balance at Jun. 30, 2018	$ 40	106,982	(36,808)	(1,179)	(674)	68,361
Balance (in shares) at Dec. 31, 2018	3,910,674
Balance at Dec. 31, 2018	$ 40	107,095	(35,790)	(1,179)	(826)	69,340
Comprehensive income:
Net (loss) income			323			323
Unrealized holding gain (loss) on available-for-sale securities, net of tax					(12)	(12)
Total comprehensive income			323		(12)	311
Common stock dividends			(39)			(39)
Share-based compensation expense		48				48
Vesting of restricted stock (in shares)	8,936
Cumulative effect of adopting ASU 2016-02			(11)			(11)
Balance (in shares) at Dec. 31, 2018	3,910,674
Balance at Dec. 31, 2018	$ 40	107,095	(35,790)	(1,179)	(826)	69,340
Balance (in shares) at Mar. 31, 2019	3,919,610
Balance at Mar. 31, 2019	$ 40	107,143	(35,517)	(1,179)	(838)	69,649
Balance (in shares) at Dec. 31, 2018	3,910,674
Balance at Dec. 31, 2018	$ 40	107,095	(35,790)	(1,179)	(826)	69,340
Comprehensive income:
Net (loss) income			(1,332)			(1,332)
Unrealized holding gain (loss) on available-for-sale securities, net of tax					267	267
Total comprehensive income			(1,332)		267	(1,065)
Common stock dividends			(77)			(77)
Share-based compensation expense		103				103
Vesting of restricted stock (in shares)	11,936
Cumulative effect of adopting ASU 2016-02			(11)			(11)
Balance (in shares) at Dec. 31, 2018	3,910,674
Balance at Dec. 31, 2018	$ 40	107,095	(35,790)	(1,179)	(826)	69,340
Comprehensive income:
Vesting of restricted stock
Balance (in shares) at Jun. 30, 2019	3,922,610
Balance at Jun. 30, 2019	$ 40	107,198	(37,210)	(1,179)	(559)	68,290
Balance (in shares) at Mar. 31, 2019	3,919,610
Balance at Mar. 31, 2019	$ 40	107,143	(35,517)	(1,179)	(838)	69,649
Comprehensive income:
Net (loss) income			(1,655)			(1,655)
Unrealized holding gain (loss) on available-for-sale securities, net of tax					279	279
Total comprehensive income			(1,655)		279	(1,376)
Common stock dividends			(38)			(38)
Share-based compensation expense		55				55
Vesting of restricted stock (in shares)	3,000
Balance (in shares) at Mar. 31, 2019	3,919,610
Balance at Mar. 31, 2019	$ 40	107,143	(35,517)	(1,179)	(838)	69,649
Balance (in shares) at Jun. 30, 2019	3,922,610
Balance at Jun. 30, 2019	$ 40	$ 107,198	$ (37,210)	$ (1,179)	$ (559)	$ 68,290