SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Changes in AOCI (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Changes in Accumulated Other Comprehensive Income (Loss)
Beginning Balance	$ (418)	$ (433)
Other comprehensive (loss) income before reclassifications	94	182
Amounts reclassified from accumulated other comprehensive loss	10	64
Net current period change in accumulated other comprehensive (loss) income	104	246
Ending Balance	(314)	(187)
Cumulative Translation Adjustment
Changes in Accumulated Other Comprehensive Income (Loss)
Beginning Balance	(204)	11
Other comprehensive (loss) income before reclassifications	97	(164)
Net current period change in accumulated other comprehensive (loss) income	97	(164)
Ending Balance	(107)	(153)
Unrealized Gain (Loss) on Securities
Changes in Accumulated Other Comprehensive Income (Loss)
Beginning Balance	(214)	(444)
Other comprehensive (loss) income before reclassifications	(3)	346
Amounts reclassified from accumulated other comprehensive loss	10	64
Net current period change in accumulated other comprehensive (loss) income	7	410
Ending Balance	$ (207)	$ (34)