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Summary of significant accounting policies - Accounting for Stock-based Compensation (Details) | 12 Months Ended
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Dec. 31, 2022 plan
Accounting Policies [Abstract] |
Number of stock based employee compensation plans | 1
Contractual life of awards | 7 years

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- Definition Represents the number of stock-based compensation plans the company maintains. + References No definition available. + Details
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Namespace Prefix: | ebs_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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Period Type: | duration