Quarterly report pursuant to Section 13 or 15(d)

Stock-based compensation (Details Narrative)

v2.4.1.9
Stock-based compensation (Details Narrative) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Apr. 13, 2015
Option, value per share $ 1.46COCP_OptionValuePerShare    
Employee stock-based compensation expense $ 93,000us-gaap_EmployeeStockOwnershipPlanESOPCompensationExpense $ 11,000us-gaap_EmployeeStockOwnershipPlanESOPCompensationExpense  
Unrecognized compensation expense $ 2,266,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized    
Weighted average period 1 year 1 month 6 days    
2007 Equity Incentive Plan [Member]      
Shares available for future grant 31,157,015us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
/ us-gaap_PlanNameAxis
= us-gaap_StockCompensationPlanMember
   
Options outstanding under plan 21,143,880us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= us-gaap_StockCompensationPlanMember
   
Authorized for future issuance 53,599,046us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= us-gaap_StockCompensationPlanMember
  31,157,135us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= us-gaap_StockCompensationPlanMember