SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Changes in AOCI (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Changes in Accumulated Other Comprehensive Income (Loss)
Beginning Balance	$ (418)	$ (433)
Other comprehensive (loss) income before reclassifications	43	377
Amounts reclassified from accumulated other comprehensive loss	(4)	39
Net current period change in accumulated other comprehensive (loss) income	39	416
Ending Balance	(379)	(17)
Cumulative Translation Adjustment
Changes in Accumulated Other Comprehensive Income (Loss)
Beginning Balance	(204)	11
Other comprehensive (loss) income before reclassifications	81	(139)
Net current period change in accumulated other comprehensive (loss) income	81	(139)
Ending Balance	(123)	(128)
Unrealized Gain (Loss) on Securities
Changes in Accumulated Other Comprehensive Income (Loss)
Beginning Balance	(214)	(444)
Other comprehensive (loss) income before reclassifications	(38)	516
Amounts reclassified from accumulated other comprehensive loss	(4)	39
Net current period change in accumulated other comprehensive (loss) income	(42)	555
Ending Balance	$ (256)	$ 111