XML 60 R48.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Subsequent Event (Details Textual) - USD ($) |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 11, 2017 | Dec. 31, 2015 | Dec. 31, 2016
Subsequent Event [Line Items] |  |  |
Common stock, par value |  | $ 0.001 | $ 0.001
Proceeds from sale of common stock |  | $ 37,000,000 |
Subsequent Event | JonesTrading |  |  |
Subsequent Event [Line Items] |  |  |
Percentage of selling commission per share sold | 3.00% |  |
Subsequent Event | Sales Agreement | JonesTrading |  |  |
Subsequent Event [Line Items] |  |  |
Common stock, par value | $ 0.001 |  |
Proceeds from sale of common stock | $ 0 |  |
Subsequent Event | Maximum | Sales Agreement | JonesTrading |  |  |
Subsequent Event [Line Items] |  |  |
Aggregate offering price of common stock | $ 7,300,000 |  |

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- Definition Aggregate offering price of common stock. + References No definition available. + Details
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Namespace Prefix: | abio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Selling commission per share sold percentage. + References No definition available. + Details
Name: | abio_SellingCommissionPerShareSoldPercentage
Namespace Prefix: | abio_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Face amount or stated value per share of common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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