4. FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2014	May 31, 2013
Money market funds	$ 452	$ 102
Assets	452	102
Liabilities	0	0
Level 1
Money market funds	452	102
Assets	452	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