The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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GOODWILL AND INTANGIBLES - Summary of intangible assets (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended		12 Months Ended
	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross		$ 31,685		$ 885
Accumulated amortization		(775)		(263)
Intangible assets net		30,910		622
Goodwill, gross		64,449		11,492
Goodwill		64,449		11,492
Intangible Assets, Net (Including Goodwill) [Abstract]
Total intangible assets & goodwill gross		96,134		12,377
Total intangible assets & goodwill Net		95,359		12,114
Amortization expense related to intangible assets	$ 43	516	$ 87
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross		2		2
Accumulated amortization		$ (2)		$ (2)
Amortization period		2 years		2 years
Brand and tradenames
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross		$ 1,695
Accumulated amortization		(96)
Intangible assets net		1,599
Brand
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross				$ 95
Accumulated amortization				(48)
Intangible assets net				$ 47
Amortization period				3 years
Developed technology
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross		10,939		$ 639
Accumulated amortization		(499)		(191)
Intangible assets net		10,440		$ 448
Amortization period				5 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets gross		19,049		$ 149
Accumulated amortization		(178)		(22)
Intangible assets net		$ 18,871		$ 127
Amortization period				10 years
Maximum \| Brand and tradenames
Finite-Lived Intangible Assets [Line Items]
Amortization period		7 years
Maximum \| Developed technology
Finite-Lived Intangible Assets [Line Items]
Amortization period		6 years
Maximum \| Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortization period		18 years
Minimum \| Brand and tradenames
Finite-Lived Intangible Assets [Line Items]
Amortization period		3 years
Minimum \| Developed technology
Finite-Lived Intangible Assets [Line Items]
Amortization period		5 years
Minimum \| Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortization period		10 years