Condensed Consolidated Statements Of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Noncontrolling Interest
Beginning balance at Dec. 31, 2019	$ 169,862	$ 111	$ 49,204	$ 157,525	$ (16,795)	$ (20,183)	$ 0
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(1,343)			(1,343)
Other comprehensive income, net of tax:
Pension liability adjustment	134					134
Foreign currency translation adjustment	(3,526)					(3,526)
Cash flow hedges reclassified to earnings	0
Unrealized derivative loss on cash flow hedges	(809)					(809)
Issuance of common shares, net of share withheld for taxes	(1,660)		(5,733)		4,073
Stock-based compensation	1,238		1,238
Ending balance at Jun. 30, 2020	163,896	111	44,709	156,182	(12,722)	(24,384)	0
Beginning balance at Mar. 31, 2020	162,506	111	44,328	155,659	(12,896)	(24,696)	0
Increase (Decrease) in Stockholders' Equity
Net income (loss)	523			523
Other comprehensive income, net of tax:
Pension liability adjustment	76					76
Foreign currency translation adjustment	181					181
Cash flow hedges reclassified to earnings	0
Unrealized derivative loss on cash flow hedges	55					55
Issuance of common shares, net of share withheld for taxes	(3)		(177)		174
Stock-based compensation	558		558
Ending balance at Jun. 30, 2020	163,896	111	44,709	156,182	(12,722)	(24,384)	0
Beginning balance at Dec. 31, 2020	176,830	111	44,583	165,107	(12,703)	(20,268)	0
Increase (Decrease) in Stockholders' Equity
Net income (loss)	1,584			1,618			(34)
Other comprehensive income, net of tax:
Pension liability adjustment	182					182
Foreign currency translation adjustment	961					940	21
Cash flow hedges reclassified to earnings	273					273
Unrealized derivative loss on cash flow hedges	0
Issuance of common shares, net of share withheld for taxes	(547)		(2,146)		1,599
Stock-based compensation	1,213		1,213
Investment of noncontrolling interest	396						396
Ending balance at Jun. 30, 2021	180,892	111	43,650	166,725	(11,104)	(18,873)	383
Beginning balance at Mar. 31, 2021	176,886	111	43,943	163,849	(11,783)	(19,588)	354
Increase (Decrease) in Stockholders' Equity
Net income (loss)	2,854			2,876			(22)
Other comprehensive income, net of tax:
Pension liability adjustment	91					91
Foreign currency translation adjustment	538					487	51
Cash flow hedges reclassified to earnings	137					137
Unrealized derivative loss on cash flow hedges	0
Issuance of common shares, net of share withheld for taxes	0		(679)		679
Stock-based compensation	386		386
Ending balance at Jun. 30, 2021	$ 180,892	$ 111	$ 43,650	$ 166,725	$ (11,104)	$ (18,873)	$ 383