8. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM (Details) (USD $) In Thousands, unless otherwise specified	May 31, 2013	May 31, 2012
Customer Deposits And Deferred Revenue Short-Term Details
Customer deposits	$ 1,728	$ 419
Deferred revenue, short-term	244	89
Customer deposits and deferred revenue, short-term	$ 1,972	$ 508

Total carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue or other forms of income in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 13

-Section A

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 13.A.Q4)

-URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780

Name:	us-gaap_DeferredRevenueAndCreditsCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant