INCOME TAXES - Schedule of Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred income tax assets
Deferred revenues	$ 0	$ 89
Other assets	16
Capital loss carryforwards	469	438
Operating loss carryforwards	0	257
Deferred income tax liabilities
Unbilled revenue	(284)
Prepaid expenses	0	(592)
Property and equipment	(346)	(577)
Valuation allowance	(469)	(438)
Deferred income tax liability, net	(614)	(823)
U.S.
Deferred income tax assets
Deferred revenues	0	89
Other assets	16
Capital loss carryforwards	0	0
Operating loss carryforwards	0	257
Deferred income tax liabilities
Unbilled revenue	0
Prepaid expenses	0	(592)
Property and equipment	0	0
Valuation allowance	0	0
Deferred income tax liability, net	16
Deferred income tax liability, net		(246)
Foreign
Deferred income tax assets
Deferred revenues	0	0
Other assets	0
Capital loss carryforwards	469	438
Operating loss carryforwards	0	0
Deferred income tax liabilities
Unbilled revenue	(284)
Prepaid expenses	0	0
Property and equipment	(346)	(577)
Valuation allowance	(469)	(438)
Deferred income tax liability, net	$ (630)	$ (577)