COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Obligations for base rent and CAM costs under facility and other non-cancelable operating leases
2017	$ 4,319
2018	4,782
2019	4,381
2020	2,348
Total minimum lease payments	15,830
Total rent and CAM expense	$ 4,800	$ 2,900	$ 2,700