Consolidated Statements of Comprehensive Loss (Unaudited) (Under Creditor Protection Proceedings as of November 29, 2011 - note 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		166 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2012
Consolidated Statements of Comprehensive Loss (Unaudited) (Under Creditor Protection Proceedings as of November 29, 2011 - note 1) [Abstract]
Net loss	$ 4,237	$ 10,662	$ 14,540	$ 35,777	$ 733,669
Foreign exchange loss (gain) on translation	1,475	(6,456)	7,476	(3,652)	(53,376)
Comprehensive Loss	5,712	4,206	22,016	32,125	680,293
Comprehensive loss attributable to non-controlling interest	0	0	0	0	(7,694)
Comprehensive loss attributable to common stockholders	$ 5,712	$ 4,206	$ 22,016	$ 32,125	$ 672,599