v3.19.1
Document And Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Mar. 04, 2019
Jun. 29, 2018
Document Information [Line Items]      
Entity Registrant Name SOPHIRIS BIO INC.    
Entity Central Index Key 0001563855    
Trading Symbol sphs    
Current Fiscal Year End Date --12-31    
Entity Filer Category Accelerated Filer    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Emerging Growth Company false    
Entity Small Business true    
Entity Common Stock, Shares Outstanding (in shares)   30,217,140  
Entity Public Float     $ 84.5
Entity Shell Company false    
Document Type 10-K    
Document Period End Date Dec. 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Amendment Flag false