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Summary of Significant Accounting Policies - Equity Incentive Plan and Stock-Based Compensation (Details) | Dec. 31, 2017 item
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Equity-based Compensation |
Number of equity-based employee compensation plans | 3

X
- Definition Represents the number of plans under the equity-based arrangements. + References No definition available. + Details
Name: | fold_ShareBasedCompensationNumberOfPlans
Namespace Prefix: | fold_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration