XML 11 R1.htm IDEA: XBRL DOCUMENT v3.10.0.1
Document And Entity Information - shares
 6 Months Ended
Jun. 30, 2018
Jul. 24, 2018
Document Information [Line Items]    
Entity Registrant Name HERON THERAPEUTICS, INC. /DE/  
Entity Central Index Key 0000818033  
Trading Symbol hrtx  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Well-known Seasoned Issuer Yes  
Entity Common Stock, Shares Outstanding (in shares)   77,734,284
Document Type 10-Q  
Document Period End Date Jun. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q2  
Amendment Flag false