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Document and Entity Information - shares
3 Months Ended
Mar. 31, 2024
May 09, 2024
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2024  
Document Fiscal Year Focus 2024  
Document Fiscal Period Focus Q1  
Entity Registrant Name INTERNATIONAL STEM CELL CORPORATION  
Entity Central Index Key 0001355790  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Entity Shell Company false  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity File Number 0-51891  
Entity Tax Identification Number 20-4494098  
Entity Address, Address Line One 9745 Businesspark Ave  
Entity Address, City or Town San Diego  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 92131  
City Area Code 760  
Local Phone Number 940-6383  
Entity Common Stock, Shares Outstanding   8,004,389
Entity Incorporation, State or Country Code DE  
Entity Interactive Data Current Yes  
Document Quarterly Report true  
Document Transition Report false