Summary of significant accounting policies, Part 4 (Details) - Emergent Plans [Member]	12 Months Ended
Dec. 31, 2018 Plan
Stock issued during period [Abstract]
Number of stock based employee compensation plans	1
Exercise period of options	10 years

Represents the period over which options can be exercised from the date of grant.

No definition available.

Name:	ebs_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisePeriod
Namespace Prefix:	ebs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration