GOODWILL AND OTHER INTANGIBLE ASSETS - SUMMARY OF INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 7,949	$ 3,151
Accumulated Amortization	(1,704)	(1,124)
Net Carrying Amount	$ 6,245	$ 2,027
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]
Gross Carrying Amount	7,529	2,731
Accumulated Amortization	(1,284)	(704)
Net Carrying Amount	$ 6,245	$ 2,027
Technology | Minimum
Finite Lived Intangible Assets [Line Items]
Useful life of identifiable intangible assets (in years)	3 years	3 years
Technology | Maximum
Finite Lived Intangible Assets [Line Items]
Useful life of identifiable intangible assets (in years)	5 years	5 years