7. INCOME TAXES (Details 1) - USD ($) $ in Thousands	12 Months Ended
May 31, 2019	May 31, 2018	May 31, 2017
Federal income taxes:
Current	$ 0	$ 99	$ 0
Deferred	0	0	0
State income taxes:
Current	(6)	(22)	(8)
Deferred	0	0	0
Foreign income taxes:
Current	(21)	(4)	(17)
Deferred	0	0	0
Income tax (expense) benefit	$ (27)	$ 73	$ (25)

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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