Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Divestiture [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Divestiture [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2017	$ 186,569		$ 347	$ 248,170	$ (52,673)	$ (8,919)		$ (356)
Beginning Balance, Shares at Dec. 31, 2017			34,708					(138)
Net income (loss)	(7,121)				(7,121)
Cumulative effect adjustment | ASU 2018-02 [Member]	(30)				1,037	(1,067)
Cumulative effect adjustment | ASU 2014-09 [Member]	(622)				(622)
Cumulative translation adjustment for divestiture		$ 375					$ 375
Exercise of stock options and dividend reinvestment issuances	$ 89			89
Exercise of stock options and dividend reinvestment issuances, Shares	16		16
Restricted stock units issued	$ (253)		$ 2	(207)	48
Restricted stock units issued, Shares			192
Share based compensation earned	3,357			3,357
Share based compensation earned, Shares			38
Adjustment for minimum pension liability, net of tax	(22)					(22)
Interest rate swap	76					76
Translation income (loss)	(3,858)					(3,858)
Ending Balance at Dec. 31, 2018	178,560		$ 349	251,409	(59,427)	(13,415)		$ (356)
Ending Balance, Shares at Dec. 31, 2018			34,954					(138)
Translation (loss) gain, beginning balance at Dec. 31, 2017	(4,250)
Translation (loss) gain, ending balance at Dec. 31, 2018	(7,733)
Interest rate swap adjustment beginning balance at Dec. 31, 2017	492
Cumulative effect adjustment for interest rate swap | ASU 2018-02 [Member]	(5)
Interest rate swap adjustment ending balance at Dec. 31, 2018	563
Minimum pension liability adjustment beginning balance at Dec. 31, 2017	(5,161)
Minimum pension liability adjustment, cumulative translation adjustment | ASU 2018-02 [Member]	(1,062)
Minimum pension liability adjustment, ending balance at Dec. 31, 2018	(6,245)
Accumulated other comprehensive loss, beginning balance at Dec. 31, 2017	(8,919)
Accumulated other comprehensive loss, cumulative translation adjustment		$ 375
Accumulated other comprehensive loss, cumulative translation adjustment | ASU 2018-02 [Member]	(1,067)
Accumulated other comprehensive loss, activity	(3,804)
Accumulated other comprehensive loss, ending balance at Dec. 31, 2018	(13,415)
Net income (loss)	17,707				17,707
Cumulative effect adjustment | Accounting Standards Update 2017-12					(11)	11
Cumulative effect adjustment | Accounting Standards Update 2016-02	$ (4,590)				(4,590)
Exercise of stock options and dividend reinvestment issuances, Shares	66		31
Restricted stock units issued	$ (447)		$ 3	(427)	23
Restricted stock units issued, Shares			255
Share based compensation earned	2,888		$ 1	2,887
Share based compensation earned, Shares			35
Adjustment for minimum pension liability, net of tax	(184)					(184)
Interest rate swap	(574)					(574)
Translation income (loss)	(343)					(343)
Ending Balance at Dec. 31, 2019	193,017		$ 353	253,869	(46,344)	(14,505)		$ (356)
Ending Balance, Shares at Dec. 31, 2019			35,275					(138)
Translation (loss) gain, ending balance at Dec. 31, 2019	(8,076)
Cumulative effect adjustment for interest rate swap | Accounting Standards Update 2017-12	11
Minimum pension liability adjustment, ending balance at Dec. 31, 2019	(6,429)
Accumulated other comprehensive loss, cumulative translation adjustment | Accounting Standards Update 2017-12	11
Accumulated other comprehensive loss, activity	(1,101)
Accumulated other comprehensive loss, ending balance at Dec. 31, 2019	(14,505)
Net income (loss)	8,172				8,211				$ (39)
Restricted stock units issued	(337)		$ (2)	(331)	8
Restricted stock units issued, Shares			230
Share based compensation earned	1,758			1,758
Adjustment for minimum pension liability, net of tax	(2,247)					(2,247)
Translation income (loss)	2,256					2,256
Noncontrolling interest acquisition	992								992
Ending Balance at Dec. 31, 2020	203,611		$ 355	$ 255,296	$ (38,141)	$ (14,496)		$ (356)	$ 953
Ending Balance, Shares at Dec. 31, 2020			35,505					(138)
Translation (loss) gain, ending balance at Dec. 31, 2020	(5,820)
Minimum pension liability adjustment, ending balance at Dec. 31, 2020	(8,676)
Accumulated other comprehensive loss, activity	9
Accumulated other comprehensive loss, ending balance at Dec. 31, 2020	$ (14,496)