PROPERTY AND EQUIPMENT, NET - Summary of Property And Equipment at Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, cost	$ 47,985	$ 45,561
Accumulated depreciation	(38,805)	(34,288)
Property and equipment, net	9,180	11,273	$ 12,243	$ 12,443	$ 10,701	$ 11,111	$ 11,341	$ 11,994	$ 12,436
Computer equipment and purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, cost	6,745	7,367
Accumulated depreciation	(5,840)	(5,353)
Property and equipment, net	905	2,014
Internal-use software
Property, Plant and Equipment [Line Items]
Property and equipment, cost	3,126	2,657
Accumulated depreciation	(716)	(492)
Property and equipment, net	$ 2,410	$ 2,165
Property and equipment used for rental program
Property, Plant and Equipment [Line Items]
Usseful life	5 years	5 years
Property and equipment, cost	$ 36,285	$ 33,941
Accumulated depreciation	(30,978)	(27,420)
Property and equipment, net	5,307	6,521
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, cost	1,543	1,327
Accumulated depreciation	(1,116)	(899)
Property and equipment, net	427	428
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, cost	286	269
Accumulated depreciation	(155)	(124)
Property and equipment, net	$ 131	$ 145
Minimum | Computer equipment and purchased software
Property, Plant and Equipment [Line Items]
Usseful life	3 years	3 years
Minimum | Internal-use software
Property, Plant and Equipment [Line Items]
Usseful life	3 years	3 years
Minimum | Furniture and equipment
Property, Plant and Equipment [Line Items]
Usseful life	3 years	3 years
Maximum | Computer equipment and purchased software
Property, Plant and Equipment [Line Items]
Usseful life	7 years	7 years
Maximum | Internal-use software
Property, Plant and Equipment [Line Items]
Usseful life	5 years	5 years
Maximum | Furniture and equipment
Property, Plant and Equipment [Line Items]
Usseful life	7 years	7 years