SIGNIFICANT ACCOUNTING POLICIES SIGNIFICANT ACCOUNTING POLICIES 2 (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Accounting Policies [Abstract]
Cash and cash equivalents	$ 36,196	$ 11,789
Funds held by lender and restricted cash	432	143
Total cash, cash equivalents, and restricted cash	$ 36,628	$ 11,932	$ 34,397