OTHER PREPAID EXPENSES AND CURRENT ASSETS (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
OTHER PREPAID EXPENSES AND CURRENT ASSETS [Abstract]
Prepaid insurance	$ 190	$ 300
Prepaid fees	807	719
Notes receivable	502	451
Other prepaid expenses and current assets	761	1,701
Prepaid expenses and other assets	$ 2,260	$ 3,171