XML 13 R1.htm IDEA: XBRL DOCUMENT v3.5.0.2
Document and Entity Information
 6 Months Ended
Jun. 30, 2016
segment
Aug. 04, 2016
shares
Document Information [Line Items]    
Number of operating segments | segment 1  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2016  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q2  
Trading Symbol OMER  
Entity Registrant Name OMEROS CORP  
Entity Central Index Key 0001285819  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding | shares   39,293,131