Unaudited Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member] Voting Common Stock [Member]	Common Stock [Member] Nonvoting Common Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balances (in shares) at Dec. 31, 2018	6,242,720	1,220,000	7,462,720
Balances at Dec. 31, 2018			$ 140,639	$ 24,287	$ (66,201)	$ (6,628)	$ 92,097
Stock issued for share-based awards, net of withholdings to satisfy employee tax obligations upon award (in shares)	1,642		1,642
Stock issued for share-based awards, net of withholdings to satisfy employee tax obligations upon award				(276)			(276)
Forfeited unvested stock (in shares)	(3,748)		(3,748)
Forfeited unvested stock
Stock-based compensation expense				82			82
Net income					2,839		2,839
Net change in accumulated other comprehensive loss, net of taxes						1,577	1,577
Balances (in shares) at Mar. 31, 2019	6,240,614	1,220,000	7,460,614
Balances at Mar. 31, 2019			$ 140,639	24,093	(63,362)	(5,051)	96,319
Stock issued for share-based awards, net of withholdings to satisfy employee tax obligations upon award (in shares)	1,642		1,642
Balances (in shares) at Dec. 31, 2019	6,251,975	1,220,000	7,471,975
Balances at Dec. 31, 2019			$ 140,639	24,508	(55,683)	(3,714)	105,750
Stock issued for share-based awards, net of withholdings to satisfy employee tax obligations upon award (in shares)	17,330		17,330
Stock issued for share-based awards, net of withholdings to satisfy employee tax obligations upon award				(37)			(37)
Forfeited unvested stock (in shares)
Forfeited unvested stock
Stock-based compensation expense				106			106
Net income					1,840		1,840
Net change in accumulated other comprehensive loss, net of taxes						(3,148)	(3,148)
Balances (in shares) at Mar. 31, 2020	6,269,305	1,220,000	7,489,305
Balances at Mar. 31, 2020			$ 140,639	$ 24,577	$ (53,843)	$ (6,862)	$ 104,511
Stock issued for share-based awards, net of withholdings to satisfy employee tax obligations upon award (in shares)	17,330		17,330