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Commitments and Contingencies - Additional Information (Detail) - Jun. 30, 2015 £ in Millions, $ in Millions	USD ($)	GBP (£)
Commitments and Contingencies Disclosure [Line Items]
Potential payment over the agreement terms	$ 53.3
Further Indication for AMR101 | Laxdale Limited
Commitments and Contingencies Disclosure [Line Items]
Potential aggregate stock or cash payment	11.8	£ 7.5
Further Indication for AMR101 | Laxdale Limited | Potential Marketing Approval 1
Commitments and Contingencies Disclosure [Line Items]
Potential aggregate stock or cash payment	7.9	5.0
Further Indication for AMR101 | Laxdale Limited | Potential Marketing Approval 2
Commitments and Contingencies Disclosure [Line Items]
Potential aggregate stock or cash payment	7.9	5.0
Further Indication for AMR101 | Laxdale Limited | Maximum
Commitments and Contingencies Disclosure [Line Items]
Potential aggregate stock or cash payment	$ 15.7	£ 10.0

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+ References

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- Definition

Commitments and Contingencies Disclosure [Line Items]

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- Definition

The amount the entity has committed to make for future royalty guarantees.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 928



-SubTopic 440



-Section 50



-Paragraph 1



-URI http://asc.fasb.org/extlink&oid=6473578&loc=d3e63223-108013

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