PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
PREPAID EXPENSES AND OTHER CURRENT ASSETS
Prepaid sales and marketing expenses	$ 1,868	$ 1,767
Prepaid insurance	489	1,182
Other prepaid expenses and assets	2,976	5,302
Total	$ 5,333	$ 8,251