INCOME TAXES - Summary of net deferred tax assets (Details 2) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2015
Deferred tax assets:
Net operating loss carryforwards	$ 46,691	$ 46,919
Asset reserves	1,713	792
Deferred research and development costs	1,356	1,009
Intangibles	539	606
Deferred gain on assets under sale-leaseback transaction	331	632
Stock-based compensation	377	224
Other	379	437
Deferred tax assets, gross	51,386	50,619
Deferred tax liabilities:
Fixed assets	(528)	(492)
Intangibles and goodwill		(84)
Deferred tax assets, net	50,858	50,043
Valuation allowance	(23,134)	(22,997)
Deferred tax assets (liabilities), net of allowance	27,724	27,046
Less current portion	2,271	1,258
Deferred tax assets (liabilities), non-current	$ 25,453	$ 25,788