CASH AND CASH EQUIVALENTS (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Cash and cash equivalents
Cash and cash equivalents	$ 37,665	$ 20,194	$ 22,146	$ 13,459
Cash
Cash and cash equivalents
Cash and cash equivalents		116
Cash	(7)
Money market fund
Cash and cash equivalents
Cash and cash equivalents	$ 37,672	$ 20,078