6. ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	May 31, 2017	May 31, 2016	May 31, 2015
Accrued Expenses Details
Payroll related	$ 934	$ 706
Professional services	161	166
Accrued interest	139	110
Commissions and bonuses	125	227
Warranty	113	155	$ 137
Taxes payable	69	63
Investor relations	25	88
Other	43	38
Accrued expenses	$ 1,609	$ 1,553