SIGNIFICANT ACCOUNTING POLICIES - CASH AND CASH EQUIVALENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash and cash equivalents
Cash and cash equivalents	$ 20,194	$ 13,459	$ 13,980	$ 12,825
Cash
Cash and cash equivalents
Cash and cash equivalents	116	269
Money market funds and other short-term investments
Cash and cash equivalents
Cash and cash equivalents	$ 20,078	$ 13,190