GOODWILL AND INTANGIBLE ASSETS - Summary of Amortizable Intangible Asset (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross	$ 31,683	$ 31,685
Accumulated amortization	(9,434)	(8,652)
Intangible assets, Net	22,249	23,033
Goodwill, Gross	63,945	63,945
Goodwill	63,945	63,945
Intangible Assets, Net (Including Goodwill) [Abstract]
Total intangible assets & goodwill, Gross	95,628	95,630
Total intangible assets & goodwill, Net	86,194	86,978
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross		2
Accumulated amortization		(2)
Intangible assets, Net		$ 0
Useful life		2 years
Brand and tradenames
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross	1,695	$ 1,695
Accumulated amortization	(756)	(699)
Intangible assets, Net	$ 939	$ 996
Brand and tradenames | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	3 years	3 years
Brand and tradenames | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	7 years	7 years
Developed technology
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross	$ 10,939	$ 10,939
Accumulated amortization	(5,571)	(5,110)
Intangible assets, Net	$ 5,368	$ 5,829
Developed technology | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	5 years	5 years
Developed technology | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	6 years	6 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross	$ 19,049	$ 19,049
Accumulated amortization	(3,107)	(2,841)
Intangible assets, Net	$ 15,942	$ 16,208
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	10 years	10 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	18 years	18 years