REVENUE - Contract Liability (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Deferred revenue	$ 1,670	$ 1,621	$ 1,670	$ 1,621	$ 1,648	$ 1,698	$ 1,629	$ 1,681
Revenue recognized in the period from amounts included in deferred revenue at the beginning of the period	$ 97	$ 120	$ 274	$ 467