7. INCOME TAXES (Details Narrative) - USD ($) $ in Thousands	12 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2013
Valuation Allowance	$ 2,223	$ (206)	$ 1,080
Impact on effective income tax rate if $919 of unrecognized tax benefit were recognized	8
Accrued interest and penalties related to unrecognized tax benefits in the provision for income taxes	2
Foreign net operating loss carryforwards	769
Federal
Net operating loss carryforward	40,100
Research and development tax credit carryforwards	1,554
Alternative minimum tax credit carryforwards	91
State
Net operating loss carryforward	33,529
Research and development tax credit carryforwards	4,672
Alternative minimum tax credit carryforwards	$ 34