COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Obligations for base rent and CAM costs under facility and other non-cancelable operating leases
2016	$ 3,021
2017	3,242
2018	2,698
2019	2,754
2020	1,524
Total minimum lease payments	13,239
Total rent and CAM expense	$ 2,900	$ 2,700	$ 2,700