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Affiliate transactions (Detail) (USD $)	3 Months Ended		6 Months Ended		55 Months Ended
Affiliate transactions (Detail) (USD $)	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Oct. 31, 2012
Related Party Transaction [Line Items]
Payable to affiliates	$ 7,482,049		$ 7,482,049		$ 7,482,049	$ 6,630,197
Borrowings from affiliates			879,098	1,457,143	7,294,449
Interest charged by affiliates	0	0	0	0
Axis Consultants Pty Ltd
Related Party Transaction [Line Items]
Borrowings from affiliates			792,852
Manager of Laos Operations
Related Party Transaction [Line Items]
Payable to affiliates	232,500		232,500		232,500	173,500
Borrowings from affiliates			$ 59,000

Amount of receivables owed to an entity that is affiliated with the reporting entity by means of direct or indirect ownership, which are usually due after one year (or one business cycle, if longer).

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- Definition

The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates.

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