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 loss	(1,866)			(1,866)
Other comprehensive income, net of tax:
Pension liability adjustment	58					58
Foreign currency translation adjustment	(3,707)					(3,707)
Cash flow hedges reclassified to earnings	0
Unrealized derivative loss on cash flow hedges	(864)					(864)
Issuance of common shares, net of share withheld for taxes	(1,657)		(5,556)		3,899
Stock-based compensation	680		680
Ending balance at Mar. 31, 2020	162,506	111	44,328	155,659	(12,896)	(24,696)	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 loss	(1,270)			(1,258)			(12)
Other comprehensive income, net of tax:
Pension liability adjustment	91					91
Foreign currency translation adjustment	423					453	(30)
Cash flow hedges reclassified to earnings	136					136
Unrealized derivative loss on cash flow hedges	0
Issuance of common shares, net of share withheld for taxes	(547)		(1,467)		920
Stock-based compensation	827		827
Investment of noncontrolling interest	396						396
Ending balance at Mar. 31, 2021	$ 176,886	$ 111	$ 43,943	$ 163,849	$ (11,783)	$ (19,588)	$ 354