SEGMENT DATA Long Lived Assets (Details) - USD ($) $ in Thousands		Mar. 31, 2020		Dec. 31, 2019		Mar. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Long-lived assets		$ 104,288	[1]	$ 113,901	[1]	$ 110,347	$ 117,604
Operating Segments
Segment Reporting Information [Line Items]
Long-lived assets	[1]	103,524		112,821
Operating Segments | Bulgaria
Segment Reporting Information [Line Items]
Long-lived assets		12,238		13,538
Operating Segments | Czech Republic
Segment Reporting Information [Line Items]
Long-lived assets		32,582		36,760
Operating Segments | Romania
Segment Reporting Information [Line Items]
Long-lived assets		29,279		31,115
Operating Segments | Slovak Republic
Segment Reporting Information [Line Items]
Long-lived assets		15,101		16,201
Operating Segments | Slovenia
Segment Reporting Information [Line Items]
Long-lived assets		14,324		15,207
Corporate
Segment Reporting Information [Line Items]
Long-lived assets		$ 764		$ 1,080

[1] ⁽¹⁾  Reflects property, plant and equipment, net