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OMIDRIA Royalty Obligation - Schedule of changes in the OMIDRIA royalty obligation (Details) $ in Thousands | 3 Months Ended
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Dec. 31, 2022 USD ($)
OMIDRIA Royalty Obligation |
Principal amount borrowed at September 30, 2022 | $ 125,000
Capitalized accrued interest | 1,695
Principal payments | (417)
OMIDRIA royalty obligation at December 31, 2022 | $ 126,278

X
- Definition No definition available + References No definition available. + Details
Name: | omer_RoyaltyObligationAbstract
Namespace Prefix: | omer_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of capitalized interest related to OMIDRIA royalty obligation. + References No definition available. + Details
Name: | omer_RoyaltyObligationCapitalizedAccruedInterest
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of principal payments related to OMIDRIA royalty obligation. + References No definition available. + Details
Name: | omer_RoyaltyObligationPrincipalPayments
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of OMIDRIA royalty obligation. + References No definition available. + Details
Name: | omer_RoyaltyObligations
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant