Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information
6 Months Ended
Jun. 30, 2019
Document And Entity Information [Abstract]  
Document Type 10-Q
Amendment Flag false
Document Period End Date Jun. 30, 2019
Document Fiscal Year Focus 2019
Document Fiscal Period Focus Q2
Trading Symbol VICL
Entity Registrant Name VICAL INC
Entity Central Index Key 0000819050
Current Fiscal Year End Date --12-31
Entity Filer Category Non-accelerated Filer
Entity File Number 000-21088
Entity Emerging Growth Company false
Entity Small Business true
Entity Current Reporting Status Yes
Entity Shell Company false
Entity Address, State or Province California
Entity Common Stock, Shares Outstanding 22,841,278