INCOME TAXES - Components of Income Tax Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Current:                      
Federal                 $ 86 $ 700 $ 0
State and local                 45 15 0
Foreign                 222 0 0
Total current provision                 353 715 0
Deferred:                      
Federal                 (79) 158 0
State and local                 0 1 0
Foreign                 312 0 0
Total deferred provision                 233 159 0
Total provision for income taxes $ (60) $ 150 $ 266 $ 230 $ 160 $ 156 $ 399 $ 159 $ 586 $ 874 $ 0