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Commitments and Contingencies - Additional Information (Detail) - Mar. 31, 2019 $ in Millions | USD ($) | GBP (£)
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Commitments And Contingencies Disclosure [Line Items] |  |
Potential payable amount over the agreement terms based on minimum purchase obligation | $ 90.0 |
Further Indication for AMR101 | Marketing Approval In Europe |  |
Commitments And Contingencies Disclosure [Line Items] |  |
Potential aggregate stock or cash payment | 9.8 | £ 7,500,000
Further Indication for AMR101 | Potential Marketing Approval 1 |  |
Commitments And Contingencies Disclosure [Line Items] |  |
Potential aggregate stock or cash payment | 6.5 | 5,000,000
Further Indication for AMR101 | Potential Marketing Approval 2 |  |
Commitments And Contingencies Disclosure [Line Items] |  |
Potential aggregate stock or cash payment | 6.5 | 5,000,000
Further Indication for AMR101 | Maximum |  |
Commitments And Contingencies Disclosure [Line Items] |  |
Potential aggregate stock or cash payment | $ 13.0 | £ 10,000,000

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- Definition Commitments and contingencies disclosure. + References No definition available. + Details
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- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
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- Definition The amount the entity has committed to make for future royalty guarantees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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