Quarterly report pursuant to Section 13 or 15(d)

Recent Other Equity and Common Stock Transactions (Details)

v2.4.1.9
Recent Other Equity and Common Stock Transactions (Details) (USD $)
3 Months Ended 6 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Jan. 31, 2015
Jan. 31, 2014
Other equity and common stock transactions        
Warrants issued to purchase shares 35,432,790us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights   35,432,790us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights  
Dividends paid $ 0us-gaap_DividendsCommonStock $ 0us-gaap_DividendsCommonStock $ 0us-gaap_DividendsCommonStock $ 0us-gaap_DividendsCommonStock
Number of warrants exercised 2,215,000oncs_WarrantsExercised   2,215,000oncs_WarrantsExercised  
Proceeds from Warrant Exercises $ 775,000us-gaap_ProceedsFromWarrantExercises   $ 775,000us-gaap_ProceedsFromWarrantExercises  
Minimum        
Other equity and common stock transactions        
Warrants exercise price (in dollars per share) $ 0.26us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
  $ 0.26us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Maximum        
Other equity and common stock transactions        
Warrants exercise price (in dollars per share) $ 1.20us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
  $ 1.20us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RangeAxis
= us-gaap_MaximumMember