Quarterly Financial Data (Unaudited) - Summary of Quarterly Financial Data (Details) - USD ($) |
3 Months Ended | 12 Months Ended | ||||||||||||||||
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Jul. 31, 2017 |
Apr. 30, 2017 |
Jan. 31, 2017 |
Oct. 31, 2016 |
Jul. 31, 2016 |
Apr. 30, 2016 |
Jan. 31, 2016 |
Oct. 31, 2015 |
Jul. 31, 2017 |
Jul. 31, 2016 |
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| Quarterly Financial Information Disclosure [Abstract] | ||||||||||||||||||
| Revenue | ||||||||||||||||||
| Research and development | 3,314,325 | 2,656,073 | 2,882,611 | 3,099,739 | 3,592,042 | 3,376,757 | 4,113,582 | 3,659,313 | ||||||||||
| General and administrative | 2,583,605 | 1,904,899 | 2,504,700 | 2,502,455 | 2,969,952 | 2,874,362 | 2,924,138 | 3,375,906 | ||||||||||
| Loss from operations | (5,897,930) | (4,560,972) | (5,387,311) | (5,602,194) | (6,561,994) | (6,251,119) | (7,037,720) | (7,035,219) | ||||||||||
| Provision for income taxes | 1,391 | 290 | 2,172 | $ 1,391 | $ 2,462 | |||||||||||||
| Net loss | $ (5,897,930) | $ (4,560,972) | $ (5,387,311) | $ (5,603,585) | $ (6,561,994) | [1] | $ (6,251,409) | [1] | $ (7,037,720) | [1] | $ (7,037,391) | [1] | $ (21,449,798) | $ (26,888,514) | ||||
| Basic and diluted net loss per share | $ (0.28) | $ (0.22) | $ (0.27) | $ (0.29) | $ (0.39) | [2] | $ (0.37) | [2] | $ (0.42) | [2] | $ (0.47) | [2] | $ (1.06) | $ (1.63) | ||||
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- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. No definition available.
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
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- References No definition available.
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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