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Stock Option Activity (Detail) (USD $)
1 Months Ended 9 Months Ended
Oct. 25, 2011
Nov. 28, 2010
Jun. 30, 2012
Number of Shares      
Balance, September 30, 2011 3,351,000   3,351,000
Options expired October 25, 2011 (375,000) (2,727,500) (375,000)
Balance, June 30, 2012     2,976,000
Exercisable, June 30, 2012     2,076,000
Weighted Average Exercise Price      
Balance, September 30, 2011 $ 0.23   $ 0.23
Options expired October 25, 2011     $ 0.71
Balance, June 30, 2012     $ 0.17
Exercisable, June 30, 2012     $ 0.18
Weighted Average Fair Market Value      
Balance, September 30, 2011 $ 0.15   $ 0.15
Options expired October 25, 2011     $ 0.27
Balance, June 30, 2012     $ 0.13
Exercisable, June 30, 2012     $ 0.14