GOODWILL AND INTANGIBLE ASSETS - Summary of Amortizable Intangible Asset (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross	$ 31,685	$ 31,685
Amortizable intangible assets, Accumulated Amortization	(5,514)	(2,360)
Amortizable intangible assets, Net	26,171	29,325
Goodwill, Gross	64,149	64,149
Goodwill, Net	64,149	64,149	$ 64,149	$ 64,403	$ 11,492	$ 11,492	$ 11,492	$ 11,492	$ 11,703
Total intangible assets and goodwill, Gross	95,834	95,834
Total intangible assets and goodwill, Net	90,320	93,474
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross	2	2
Amortizable intangible assets, Accumulated Amortization	(2)	(2)
Amortizable intangible assets, Net	$ 0	$ 0
Amortizable intangible assets, Amortization Period	2 years	2 years
Brand and tradenames
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross	$ 1,695	$ 1,695
Amortizable intangible assets, Accumulated Amortization	(470)	(226)
Amortizable intangible assets, Net	1,225	1,469
Developed technology
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross	10,939	10,939
Amortizable intangible assets, Accumulated Amortization	(3,266)	(1,421)
Amortizable intangible assets, Net	7,673	9,518
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross	19,049	19,049
Amortizable intangible assets, Accumulated Amortization	(1,776)	(711)
Amortizable intangible assets, Net	$ 17,273	$ 18,338
Minimum | Brand and tradenames
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, Amortization Period	3 years	3 years
Minimum | Developed technology
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, Amortization Period	5 years	5 years
Minimum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, Amortization Period	10 years	10 years
Maximum | Brand and tradenames
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, Amortization Period	7 years	7 years
Maximum | Developed technology
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, Amortization Period	6 years	6 years
Maximum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, Amortization Period	18 years	18 years