SEGMENT INFORMATION - Long Lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	$ 34,283	$ 36,635
Long-lived assets percentage	100.00%	100.00%
U.S.
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	$ 26,644	$ 26,392
Long-lived assets percentage	78.00%	72.00%
India
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	$ 2,017	$ 3,843
Long-lived assets percentage	6.00%	10.00%
International, other
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	$ 5,622	$ 6,400
Long-lived assets percentage	16.00%	18.00%