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Commitments and Contingencies - Additional Information (Detail)
In Millions, unless otherwise specified
6 Months Ended 0 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended 42 Months Ended 6 Months Ended 30 Months Ended
Jun. 30, 2014
Amr One Hundred One
Contract
Apr. 30, 2014
BASF
USD ($)
Jun. 30, 2014
BASF
USD ($)
Sep. 30, 2013
Chemport
USD ($)
Jul. 31, 2011
Chemport
USD ($)
Jun. 30, 2014
Chemport
USD ($)
Jun. 30, 2014
Chemport
USD ($)
Dec. 31, 2013
Chemport
USD ($)
Dec. 31, 2012
Chemport
Anticipated investment before the end of 2012
USD ($)
Jun. 30, 2014
Chemport
Maximum
USD ($)
Jun. 30, 2014
Slanmhor
USD ($)
Jun. 30, 2014
Slanmhor
USD ($)
Jun. 30, 2014
First Indication for AMR101
Laxdale Limited
USD ($)
Jun. 30, 2014
First Indication for AMR101
Laxdale Limited
GBP (£)
Jun. 30, 2014
Further Indication for AMR101
Laxdale Limited
Potential Marketing Approval 1
USD ($)
Jun. 30, 2014
Further Indication for AMR101
Laxdale Limited
Potential Marketing Approval 1
GBP (£)
Jun. 30, 2014
Further Indication for AMR101
Laxdale Limited
Potential Marketing Approval 2
USD ($)
Jun. 30, 2014
Further Indication for AMR101
Laxdale Limited
Potential Marketing Approval 2
GBP (£)
Jun. 30, 2014
Further Indication for AMR101
Laxdale Limited
Maximum
USD ($)
Jun. 30, 2014
Further Indication for AMR101
Laxdale Limited
Maximum
GBP (£)
Commitments and Contingencies Disclosure [Line Items]                                        
Number of signed agreements 2                                      
Refund received for material repurchases   $ 3.0                                    
Payment made under the agreements     0     1.3 3.1       0.4 6.2                
Minority share equity investment commitment                 1.6 3.3                    
Cash paid for cost method investment         1.7                              
Investment in supplier sold amount       1.3                                
Carry amount of investment           2.0 2.0 3.3                        
Potential aggregate stock or cash payment                         $ 12.8 £ 7.5 $ 8.5 £ 5.0 $ 8.5 £ 5.0 $ 17.0 £ 10.0