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Feb. 06, 2023
Cover [Abstract]  
Entity Central Index Key 0001285819
Amendment Flag false
Securities Act File Number 001-34475
Document Type 8-K
Entity Registrant Name OMEROS CORPORATION
Entity Address, Address Line One 201 Elliott Avenue West
Entity Address, City or Town Seattle
Entity Address, State or Province WA
Entity Address, Postal Zip Code 98119
City Area Code 206
Local Phone Number 676-5000
Entity Emerging Growth Company false