Condensed Consolidated Statement of Stockholders Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings	Treasury Stock [Member]	AOCI Attributable to Parent [Member]
Beginning balance at Dec. 31, 2018	$ 186,569	$ 172	$ 105,850	$ 116,039	$ (13,802)	$ (21,690)
Net Income (Loss) Available to Common Stockholders, Basic				5,694
Net income (loss)	5,694
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	(2,118)					(2,118)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(2,118)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			1,739
Stock Granted, Value, Share-based Compensation, Net of Forfeitures	1,739
Adjustments To Additional Paid In Capital Share Based Compensation Employer Contributions To Retirement Plan	2,200		(1,546)		3,746
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	959		(3,052)		4,011
Ending balance at Sep. 30, 2019	195,043	172	102,991	121,733	(6,045)	(23,808)
Beginning balance at Jun. 30, 2019	193,764	172	104,187	119,592	(9,830)	(20,357)
Net Income (Loss) Available to Common Stockholders, Basic				2,141
Net income (loss)	2,141
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	(3,451)					(3,451)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(3,451)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			783
Stock Granted, Value, Share-based Compensation, Net of Forfeitures	783
Adjustments To Additional Paid In Capital Share Based Compensation Employer Contributions To Retirement Plan	737		(585)		1,322
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	1,069		(1,394)		2,463
Ending balance at Sep. 30, 2019	195,043	172	102,991	121,733	(6,045)	(23,808)
Beginning balance at Dec. 31, 2019	209,914	172	102,319	131,228	(4,070)	(19,735)
Net Income (Loss) Available to Common Stockholders, Basic				(1,379)
Net income (loss)	(1,379)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	(2,858)					(2,858)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(2,858)
Treasury Stock, Value, Acquired, Cost Method	(1,833)				(1,833)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			3,805
Stock Granted, Value, Share-based Compensation, Net of Forfeitures	3,805
Adjustments To Additional Paid In Capital Share Based Compensation Employer Contributions To Retirement Plan	2,326	1	(1,309)		3,634
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	(985)		(2,476)		1,491
Ending balance at Sep. 30, 2020	208,990	173	102,339	129,849	(778)	(22,593)
Beginning balance at Jun. 30, 2020	202,741	172	100,023	129,328	(1,366)	(25,416)
Net Income (Loss) Available to Common Stockholders, Basic				521
Net income (loss)	521
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	2,823					2,823
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	2,823
Treasury Stock, Value, Acquired, Cost Method	(7)				(7)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			2,592
Stock Granted, Value, Share-based Compensation, Net of Forfeitures	2,592
Adjustments To Additional Paid In Capital Share Based Compensation Employer Contributions To Retirement Plan	747	1	264		482
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	(427)		(540)		113
Ending balance at Sep. 30, 2020	$ 208,990	$ 173	$ 102,339	$ 129,849	$ (778)	$ (22,593)