Affiliate transactions (Detail) (USD $)	3 Months Ended		9 Months Ended		58 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Oct. 31, 2012
Related Party Transaction [Line Items]
Payable to affiliates	$ 6,922,946		$ 6,922,946		$ 6,922,946	$ 6,630,197
Borrowings from affiliates			1,190,586	2,128,288	7,605,937
Realized foreign currency gain on loan from affiliates			897,837
Interest charged by affiliates	0	0	0	0
Manager of Laos Operations [Member]
Related Party Transaction [Line Items]
Payable to affiliates	232,500		232,500		232,500	173,500
Borrowings from affiliates			59,000
AXIS Consultants Pty Ltd [Member]
Related Party Transaction [Line Items]
Borrowings from affiliates			$ 1,131,568