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Warrants (Detail)
1 Months Ended 9 Months Ended 1 Months Ended
Oct. 16, 2009
Oct. 31, 2012
Oct. 29, 2012
Jan. 31, 2012
Oct. 29, 2012
Convertible Note
Oct. 16, 2009
Convertible Note
Oct. 29, 2012
Placement Agents
Oct. 16, 2009
Placement Agents
Oct. 29, 2012
Amendment Warrants
Class of Warrant or Right [Line Items]                  
Exercise Price 0.11485 0.125 0.11485 0.11485 0.45 0.11485 0.50000 0.11485 0.45000
Warrants outstanding 1,500,000 2,100,000     500,000 1,250,000 100,000 250,000 500,000
Weighted average remaining contractual life   3 years 9 months 26 days       3 years 9 months 4 days 5 years 3 years 9 months 4 days 3 years 9 months 4 days
Warrants Exercisable   2,100,000       1,250,000 100,000 250,000 500,000
Weighted average exercise price   0.21299       0.11485 0.50000 0.11485 0.45000