Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details Textual)

v2.4.1.9
Commitments and Contingencies (Details Textual) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Operating Leased Assets [Line Items]    
Operating Leases, Rent Expense, Net $ 19,015us-gaap_OperatingLeasesRentExpenseNet $ 5,400us-gaap_OperatingLeasesRentExpenseNet
Laboratory Space [Member]    
Operating Leased Assets [Line Items]    
Operating Leases, Rent Expense, Net $ 5,700us-gaap_OperatingLeasesRentExpenseNet
/ cobu_OperatingPlaceAxis
= cobu_LaboratorySpaceMember