Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v2.4.1.9
Subsequent Events (Details) (Subsequent Event, USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended
Jun. 08, 2015
Jun. 08, 2015
Subsequent Event
   
Subsequent Event    
Shares issued in offering 2,469,091us-gaap_StockIssuedDuringPeriodSharesNewIssues
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Share Price $ 5.50us-gaap_SharePrice
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$ 5.50us-gaap_SharePrice
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Gross proceeds from public offering $ 13.6oncs_ProceedsFromIssuanceOfCommonStockGross
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Net proceeds from public offering $ 12.6oncs_ProceedsFromIssuanceOfCommonStockNet
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Placement agent fees as a percentage of offering proceeds 6.00%oncs_StockIssuanceCostsPlacementAgentFeesPercentage
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Non-accountable expense allowance as a percentage of gross proceeds of offering 1.00%oncs_StockIssuanceCostsPlacementExpenseReimbursementPercentage
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Percentage of warrants paid to placement agents 5.00%oncs_StockIssuanceWarrantsPlacementAgentPercentage
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Warrants issued to placement agents (in shares) 123,455oncs_StockIssuanceWarrantsIssuedNumber
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