4. FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	May 31, 2013
Money market funds	$ 402	$ 102
Assets	402	102
Liabilities	0	0
Level 1
Money market funds	402	102
Assets	402	102
Liabilities	0	0
Level 2
Money market funds	0	0
Assets	0	0
Liabilities	0	0
Level 3
Money market funds	0	0
Assets	0	0
Liabilities	$ 0	$ 0