INCOME TAXES Components Of Income Tax Expense Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current tax provision (benefit):
U.S. Federal	$ 0	$ 0	$ 0
State and local	19	(11)	18
Foreign	1,926	981	439
Total current provision for (benefit from) income taxes	1,945	970	457
Deferred tax provision (benefit):
U.S. Federal	0	0	0
State and local	0	0	0
Foreign	339	(228)	189
Total deferred provision for (benefit from) income taxes	339	(228)	189
Provision for (benefit from) income taxes	$ 2,284	$ 742	$ 646