XML 27 R31.htm IDEA: XBRL DOCUMENT v2.4.1.9
Commitments and Contingencies (Details Textual) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Aug. 01, 2013
sqft
Commitments and Contingencies (Textual) [Abstract]      
Clinical research agreement with Duke University, termination notice period 90 days    
Expected milestone payments due upon approval $ 8,000,000abio_ExpectedMilestonePaymentsUponApproval    
Another expected milestone payments due upon approval 5,000,000abio_AnotherExpectedMilestonePaymentsUponApproval    
Minimum percentage of royalty obligation 12.50%abio_MinimumPercentageOfRoyaltyObligation    
Maximum percentage of royalty obligation 25.00%abio_MaximumPercentageOfRoyaltyObligation    
Product sales levels royalty 5.00%abio_PercentageOfRoyaltyObligatedToPayUnderItsOriginalLicenseAgreement    
Minimum percentage of range of royalties that can be bought down 12.50%abio_MinimumPercentageOfRangeOfRoyaltiesThatCanBeBuyDown    
Maximum percentage of range of royalties that can be bought down 17.00%abio_MaximumPercentageOfRangeOfRoyaltiesThatCanBeBuyDown    
Royalty buy down due period 6 months    
Rent expense $ 78,000us-gaap_OperatingLeasesRentExpenseNet $ 63,000us-gaap_OperatingLeasesRentExpenseNet  
Westminster, Colorado      
Commitments and Contingencies (Textual) [Abstract]      
Area of office facilities taken on lease     5,300us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= abio_WestminsterMember
Lease term 3 years    
Lease expiry date Sep. 30, 2016