CASH AND CASH EQUIVALENTS (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Cash and cash equivalents
Total cash and cash equivalents	$ 25,114	$ 13,459	$ 20,850	$ 13,980
Cash.
Cash and cash equivalents
Total cash and cash equivalents	(187)	269
Money market fund
Cash and cash equivalents
Total cash and cash equivalents	$ 25,301	$ 13,190