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Net Loss Per Share (Details Textual) | 12 Months Ended
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Dec. 31, 2015 shares
Warrants |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |
Securities in-the-money | 0
Stock options |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |
Securities in-the-money | 0

X
- Definition This represents the number of securities that are "in-the-money" as of the end of the reporting period. + References No definition available. + Details
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Namespace Prefix: | abio_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
Data Type: | na
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X
- Details
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Namespace Prefix: |
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