v3.26.1
Document And Entity Information
 6 Months Ended
Jun. 30, 2026
shares
Document Information [Line Items]  
Entity Central Index Key 0001495584
Entity Registrant Name Firsthand Technology Value Fund, Inc.
Amendment Flag false
Current Fiscal Year End Date --12-31
Document Fiscal Period Focus Q2
Document Fiscal Year Focus 2026
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Jun. 30, 2026
Document Transition Report false
Entity File Number 333-168195
Entity Incorporation, State or Country Code MD
Entity Tax Identification Number 27-3008946
Entity Address, Address Line One 3031 Tisch Way, #110 Plaza West
Entity Address, City or Town San Jose
Entity Address, State or Province CA
Entity Address, Postal Zip Code 95128
City Area Code 408
Local Phone Number 886-7096
Title of 12(b) Security Common
Trading Symbol SVVC
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Non-accelerated Filer
Entity Small Business false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Shell Company false
Entity Common Stock, Shares Outstanding 6,892,518