INCOME TAXES Operating Loss Carryforward (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Undistributed Earnings of Foreign Subsidiaries	$ 0	$ 0	$ 0
Year 2016 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	29,785,000
Year 2017 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	64,293,000
Year 2018 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	53,497,000
Year 2019 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	53,392,000
Year 2020 Through 2035 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	309,861,000
Thereafter [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	1,726,000
BULGARIA | Year 2016 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
BULGARIA | Year 2017 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
BULGARIA | Year 2018 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	2,586,000
BULGARIA | Year 2019 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
BULGARIA | Year 2020 Through 2035 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
BULGARIA | Thereafter [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
CZECH REPUBLIC | Year 2016 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	627,000
CZECH REPUBLIC | Year 2017 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	3,000
CZECH REPUBLIC | Year 2018 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
CZECH REPUBLIC | Year 2019 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
CZECH REPUBLIC | Year 2020 Through 2035 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
CZECH REPUBLIC | Thereafter [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
NETHERLANDS | Year 2016 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	29,158,000
NETHERLANDS | Year 2017 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	64,290,000
NETHERLANDS | Year 2018 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	50,911,000
NETHERLANDS | Year 2019 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	53,392,000
NETHERLANDS | Year 2020 Through 2035 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	309,861,000
NETHERLANDS | Thereafter [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
UNITED KINGDOM | Year 2016 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
UNITED KINGDOM | Year 2017 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
UNITED KINGDOM | Year 2018 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
UNITED KINGDOM | Year 2019 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
UNITED KINGDOM | Year 2020 Through 2035 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0
UNITED KINGDOM | Thereafter [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 1,726,000
Minimum [Member] | UNITED KINGDOM
Operating Loss Carryforwards [Line Items]
Income Tax Examination, Year under Examination	2016
Minimum [Member] | SLOVAKIA
Operating Loss Carryforwards [Line Items]
Income Tax Examination, Year under Examination	2010
Minimum [Member] | ROMANIA
Operating Loss Carryforwards [Line Items]
Income Tax Examination, Year under Examination	2014
Minimum [Member] | NETHERLANDS
Operating Loss Carryforwards [Line Items]
Income Tax Examination, Year under Examination	2015
Minimum [Member] | CZECH REPUBLIC
Operating Loss Carryforwards [Line Items]
Income Tax Examination, Year under Examination	2012
Minimum [Member] | BULGARIA
Operating Loss Carryforwards [Line Items]
Income Tax Examination, Year under Examination	2013