Annual report pursuant to Section 13 and 15(d)

Statement of Stockholders' Equity and Consolidated Statements of Stockholders' Equity (Parenthetical)

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Statement of Stockholders' Equity and Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($)
 2 Months Ended 5 Months Ended 10 Months Ended 12 Months Ended
Sep. 17, 2013
Dec. 17, 2012
Jun. 09, 2015
Jun. 06, 2014
Jul. 31, 2015
Jul. 31, 2014
Jul. 31, 2013
Statement of Stockholders' Equity and Consolidated Statements of Stockholders' Equity              
Payment of finance and offering costs $ 836,360 $ 504,000 $ 1,091,794 $ 1,145,000 $ 1,091,794 $ 1,981,360 $ 504,000