REVENUE - Contract Liability (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Dec. 31, 2018	Dec. 31, 2018
Increase (Decrease) In Contract with Customer, Liability [Roll Forward]
Deferred revenue, beginning of the period	$ 1,428	$ 511
Deferred revenue, end of the period	1,437	1,437
Revenue recognized in the period from amounts included in deferred revenue at the beginning of the period	65	221
Calculated under Revenue Guidance in Effect before Topic 606
Increase (Decrease) In Contract with Customer, Liability [Roll Forward]
Deferred revenue, beginning of the period		511
Deferred revenue, end of the period	357	357
Accounting Standards Update 2014-09 | Adjustment
Increase (Decrease) In Contract with Customer, Liability [Roll Forward]
Deferred revenue, end of the period	$ (1,080)	$ (1,080)