Note 7 - Plant, Property and Equipment, Net (Details) (USD $)	3 Months Ended	6 Months Ended
Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2012	Nov. 30, 2011
Depreciation Expense	$ 25,540	$ 29,425	$ 54,013	$ 67,245

Amount of total depreciation expense for property, plant and equipment. Includes production and non-production related depreciation.

No definition available.

Name:	us-gaap_DepreciationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration