GOODWILL AND OTHER INTANGIBLE ASSETS - SUMMARY OF INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,151	$ 1,333
Accumulated Amortization	(958)	(697)
Net Carrying Amount	$ 2,193	$ 636
Network list
Finite Lived Intangible Assets [Line Items]
Useful life of identifiable intangible assets (in years)	2 years	2 years
Gross Carrying Amount	$ 420	$ 420
Accumulated Amortization	(420)	(420)
Net Carrying Amount	0	$ 0
Technology
Finite Lived Intangible Assets [Line Items]
Useful life of identifiable intangible assets (in years)		3 years
Gross Carrying Amount	2,731	$ 913
Accumulated Amortization	(538)	(277)
Net Carrying Amount	$ 2,193	$ 636
Technology | Minimum
Finite Lived Intangible Assets [Line Items]
Useful life of identifiable intangible assets (in years)	3 years
Technology | Maximum
Finite Lived Intangible Assets [Line Items]
Useful life of identifiable intangible assets (in years)	5 years