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Summary of significant accounting policies, Part 3 (Details) - BARDA [Member] Dose in Millions, $ in Millions | Mar. 16, 2017 USD ($) Dose | Sep. 30, 2016 USD ($)
--- | --- | ---
BioThrax [Member] |  |
Product Information [Line Items] |  |
Amount of contract | $ 100.0 |
Period of performance | 2 years |
Consideration allocated to procurement | $ 93.6 |
NuThrax [Member] |  |
Product Information [Line Items] |  |
Consideration allocated to development activities | $ 137.1 | $ 147.5
NuThrax [Member] | Minimum [Member] |  |
Product Information [Line Items] |  |
Number of doses to be delivered | Dose | 2 |
NuThrax [Member] | Maximum [Member] |  |
Product Information [Line Items] |  |
Number of doses to be delivered | Dose | 3 |
Discount on purchase price for doses to be procured | $ 100.0 |

X
- Definition Amount of contract with BARDA for the delivery of BioThrax. + References No definition available. + Details
Name: | ebs_AmountOfContract
Namespace Prefix: | ebs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of consideration allocated to delivery of the drug under the agreement. + References No definition available. + Details
Name: | ebs_ConsiderationAllocatedToDelivery
Namespace Prefix: | ebs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of consideration allocated to development activities for the drug under the agreement. + References No definition available. + Details
Name: | ebs_ConsiderationAllocatedToDevelopmentActivities
Namespace Prefix: | ebs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Discount on purchase price for doses to be procured. + References No definition available. + Details
Name: | ebs_DiscountOnPurchasePriceForDosesToBeProcured
Namespace Prefix: | ebs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of doses to be delivered under the contract. + References No definition available. + Details
Name: | ebs_NumberOfDosesToBeDelivered
Namespace Prefix: | ebs_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period of performance for delivery of BioThrax. + References No definition available. + Details
Name: | ebs_PeriodOfPerformance
Namespace Prefix: | ebs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ProductInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ProductOrServiceAxis=ebs_BiothraxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ebs_BARDAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=ebs_NuThraxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |