Quarterly report pursuant to sections 13 or 15(d)

Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical)

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Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical) (USD $)
1 Months Ended 5 Months Ended 8 Months Ended 9 Months Ended 63 Months Ended
Jun. 30, 2011
Dec. 31, 2012
Mar. 28, 2012
Apr. 30, 2013
Apr. 30, 2012
Apr. 30, 2013
Consolidated Statements of Stockholders' Equity (Deficit)            
Public offering on December 17, 2012 and March 28, 2012, issuance costs $ 210,000 $ 504,000 $ 542,500 $ 504,000 $ 542,500 $ 1,046,500