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Note 8 - OMIDRIA Royalty Obligation - Schedule of Principal and Interest Payments on Royalty Obligations (Details) $ in Thousands | Jun. 30, 2025 USD ($)
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2025, principal | $ 8,799
2025, interest | 9,416
2025, annual cap | 18,215
2026, principal | 22,439
2026, interest | 17,322
2026, annual cap | 39,761
2027, principal | 25,654
2027, interest | 15,004
2027, annual cap | 40,658
2028, principal | 29,068
2028, interest | 12,372
2028, annual cap | 41,440
Thereafter, principal | 111,718
Thereafter, interest | 17,645
Thereafter, annual cap | 129,363
Total scheduled payments, principal | 197,678
Total scheduled payments, interest | 71,759
Total scheduled payments, annual cap | $ 269,437

X
- Definition Amount of total interest portion of royalty obligation. + References No definition available. + Details
Name: | omer_RoyaltyObligationInterestPaymentsDue
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of interest portion of royalty obligation due after fourth fiscal year following current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationInterestPaymentsDueAfterYearFour
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of interest portion of royalty obligation to be paid in next fiscal year following current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationInterestPaymentsDueNextTwelveMonths
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of interest portion of royalty obligation to be paid in remainder of current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationInterestPaymentsDueRemainderOfFiscalYear
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of interest portion of royalty obligation to be paid in third fiscal year following current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationInterestPaymentsDueYearThree
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of interest portion of royalty obligation to be paid in second fiscal year following current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationInterestPaymentsDueYearTwo
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of total royalty obligation. + References No definition available. + Details
Name: | omer_RoyaltyObligationPaymentsDue
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of total royalty obligation due after fourth fiscal year following current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationPaymentsDueAfterYearFour
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of total royalty obligation to be paid in next fiscal year following current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationPaymentsDueNextTwelveMonths
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of total royalty obligation to be paid in the remainder of the current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationPaymentsDueRemainderOfFiscalYear
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of total royalty obligation to be paid in third fiscal year following current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationPaymentsDueYearThree
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of total royalty obligation to be paid in second fiscal year following current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationPaymentsDueYearTwo
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of total principal portion of royalty obligation. + References No definition available. + Details
Name: | omer_RoyaltyObligationPrincipalPaymentsDue
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of principal portion of royalty obligation due after fourth fiscal year following current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationPrincipalPaymentsDueAfterYearFour
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of principal portion of royalty obligation to be paid in next fiscal year following current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationPrincipalPaymentsDueNextTwelveMonths
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of principal portion of royalty obligation to be paid in remainder of current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationPrincipalPaymentsDueRemainderOfFiscalYear
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of principal portion of royalty obligation to be paid in third fiscal year following current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationPrincipalPaymentsDueYearThree
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of principal portion of royalty obligation to be paid in second fiscal year following current fiscal year. + References No definition available. + Details
Name: | omer_RoyaltyObligationPrincipalPaymentsDueYearTwo
Namespace Prefix: | omer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant