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Stockholders' Equity (Details) (USD $)
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3 Months Ended | 9 Months Ended | 87 Months Ended | ||
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Apr. 30, 2015
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Apr. 30, 2014
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Apr. 30, 2015
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Apr. 30, 2014
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Apr. 30, 2015
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| Stockholders' Equity | |||||
| Stockholders' equity at beginning of period | $ 38,068,058us-gaap_StockholdersEquity | $ 4,739,124us-gaap_StockholdersEquity | |||
| Net loss | (5,987,345)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | (3,816,844)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | (14,666,698)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | (8,468,760)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | (40,000,000)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic |
| Stock-based compensation | 1,650,550us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 1,397,174us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | |||
| Common stock issued for services | 59,250us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | 150,000us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | |||
| Exercise of common stock warrants | 775,257oncs_StockIssuedDuringPeriodValueExerciseOfWarrants | 15,254,873oncs_StockIssuedDuringPeriodValueExerciseOfWarrants | |||
| Public offering on September 18, 2013, net of issuance costs of $836,360 | 11,111,640us-gaap_StockIssuedDuringPeriodValueNewIssues | ||||
| Exercise of stock options | 1,738us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised | 338,138us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised | |||
| Stockholders' equity at end of period | 25,888,155us-gaap_StockholdersEquity | 24,522,189us-gaap_StockholdersEquity | 25,888,155us-gaap_StockholdersEquity | 24,522,189us-gaap_StockholdersEquity | 25,888,155us-gaap_StockholdersEquity |
| Issuance costs | $ 836,360us-gaap_PaymentsOfStockIssuanceCosts | ||||
| X | ||||||||||
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- Definition
Value of shares of stock issued during the period upon exercise of warrants. No definition available.
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| X | ||||||||||
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- Definition
This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation". Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The cash outflow for cost incurred directly with the issuance of an equity security. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Value of stock issued as a result of the exercise of stock options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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