PROPERTY AND EQUIPMENT - Summary of property and equipment at cost (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2015	Jun. 30, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Cost	$ 32,800	$ 32,437
Less accumulated depreciation	(21,944)	(19,568)
Property and equipment, Net	$ 10,856	$ 12,869
Computer equipment and purchased software
Property, Plant and Equipment [Line Items]
Useful lives	3-7 years	3-7 years
Property, plant and equipment, Cost	$ 4,858	$ 4,670
Less accumulated depreciation	(4,188)	(4,017)
Property and equipment, Net	$ 670	$ 653
Property and equipment used for rental program
Property, Plant and Equipment [Line Items]
Useful lives	5 years	5 years
Property, plant and equipment, Cost	$ 26,630	$ 26,469
Less accumulated depreciation	(16,611)	(14,476)
Property and equipment, Net	$ 10,019	$ 11,993
Furniture and equipment
Property, Plant and Equipment [Line Items]
Useful lives	3-7 years	3-7 years
Property, plant and equipment, Cost	$ 737	$ 723
Less accumulated depreciation	(599)	(572)
Property and equipment, Net	$ 138	$ 151
Leasehold improvements
Property, Plant and Equipment [Line Items]
Useful lives	Lesser of life or lease term	Lesser of life or lease term
Property, plant and equipment, Cost	$ 575	$ 575
Less accumulated depreciation	(546)	(503)
Property and equipment, Net	$ 29	$ 72