v3.19.3
Cover
Dec. 05, 2019
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Dec. 05, 2019
Entity File Number 001-34475
Entity Registrant Name OMEROS CORPORATION
Entity Central Index Key 0001285819
Entity Tax Identification Number 91-1663741
Entity Incorporation, State or Country Code WA
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
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common stock, $0.01 par value per share
Trading Symbol OMER
Security Exchange Name NASDAQ
Entity Emerging Growth Company false