XML 28 R27.htm IDEA: XBRL DOCUMENT v2.4.0.8

Property and Equipment (Details Textual) (USD $)	6 Months Ended		138 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013
Property and Equipment (Textual) [Abstract]
Depreciation and amortization expense	$ 19,000	$ 24,000	$ 1,800,000

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- Details

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Namespace Prefix:	abio_
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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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