REVENUE - Contract Liability (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Deferred revenue	$ 1,648	$ 1,629	$ 1,648	$ 1,629	$ 1,639	$ 1,698	$ 1,649	$ 1,681
Revenue recognized in the period from amounts included in deferred revenue at the beginning of the period	$ 95	$ 209	$ 184	$ 360