GOODWILL AND INTANGIBLES - Summary of Amortizable Intangible Asset (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross	$ 31,685	$ 31,685
Accumulated amortization	(3,944)	(2,360)
Intangible assets, Net	27,741	29,325
Goodwill	64,149	64,149	$ 64,403
Total intangible assets & goodwill, gross	95,834	95,834
Total intangible assets & goodwill, net	91,890	93,474
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross	2	2
Accumulated amortization	(2)	(2)
Intangible assets, Net	$ 0	$ 0
Amortization Period	2 years	2 years
Brand and tradenames
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross	$ 1,695	$ 1,695
Accumulated amortization	(356)	(226)
Intangible assets, Net	$ 1,339	$ 1,469
Brand and tradenames | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization Period	7 years	7 years
Brand and tradenames | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization Period	3 years	3 years
Developed technology
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross	$ 10,939	$ 10,939
Accumulated amortization	(2,343)	(1,421)
Intangible assets, Net	$ 8,596	$ 9,518
Developed technology | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization Period	6 years	6 years
Developed technology | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization Period	5 years	5 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross	$ 19,049	$ 19,049
Accumulated amortization	(1,243)	(711)
Intangible assets, Net	$ 17,806	$ 18,338
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization Period	18 years	18 years
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization Period	10 years	10 years