7. INCOME TAXES (Details Narrative) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2014	May 31, 2013
Valuation Allowance	$ 421	$ 2,223	$ (206)
Foreign net operating loss carryforwards	848
Unrecognized tax benefits	789	$ 919	$ 973	$ 1,007
Federal
Net operating loss carryforward	45,272
Research and development tax credit carryforwards	1,769
Alternative minimum tax credit carryforwards	91
State
Net operating loss carryforward	31,110
Research and development tax credit carryforwards	4,894
Alternative minimum tax credit carryforwards	$ 34