Consolidated Balance Sheets (Unaudited) (Under Creditor Protection Proceedings as of November 29, 2011 - note 1) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2011	Apr. 30, 2011
Current Assets:
Cash and cash equivalents	$ 4,532	$ 15,984
Restricted cash (note 4)	2,749	1,862
Accounts receivable	494	921
Prepaid expenses	1,331	630
Total Current Assets	9,106	19,397
Property and Equipment (notes 6 and 7)	137,241	153,795
Assets held for sale ( note 5)	10,285	0
Total Assets	156,632	173,192
Current Liabilities:
Accounts payable	1,315	561
Accrued liabilities	3,189	5,696
Current portion of asset retirement obligation (note 8)	7,405	7,297
Total Current Liabilities	11,909	13,554
Obligation under sublease contract	1,122	550
Asset Retirement Obligation (note 8)	20,101	19,585
Liabilities related to assets held for sale (note 5)	233	0
Capital Stock
Preferred Stock, par value of $0.001 each, 10,000,000 shares authorized, 1 Series B Preferred share outstanding, 2,500 Series C preferred shares outstanding (notes 10 and 11)	0	0
Common Stock, par value of $0.001 each, 750,000,000 shares authorized, 348,698,837 and 348,495,556 shares outstanding at October 31, 2011 and April 30, 2011 respectively (note 11)	348	348
Additional Paid-in Capital	789,806	789,738
Deficit Accumulated During Development Stage	(721,738)	(711,435)
Accumulated Other Comprehensive Income	54,851	60,852
Total Stockholders' Equity	123,267	139,503
Total Liabilities and Stockholders' Equity	$ 156,632	$ 173,192