PREPAID EXPENSES (Details Textual) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Prepaid Expense, Current $ 1,103 $ 1,103
Prepaid Expense, Noncurrent 827 $ 1,378
City Of Hope [Member]    
Payments to Suppliers $ 2,665