XML 10 R1.htm IDEA: XBRL DOCUMENT v3.22.2
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2022
Aug. 02, 2022
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2022  
Securities Act File Number 814-00802  
Entity Registrant Name HORIZON TECHNOLOGY FINANCE CORPORATION  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 27-2114934  
Entity Address, State or Province CT  
Entity Address, Address Line One 312 Farmington Avenue  
Entity Address, City or Town Farmington  
Entity Address, Postal Zip Code 06032  
City Area Code 860  
Local Phone Number 676-8654  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   25,382,424
Entity Central Index Key 0001487428  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Common Stock [Member]    
Title of 12(b) Security Common Stock, par value $0.001 per share  
Trading Symbol HRZN  
Security Exchange Name NASDAQ  
4.875% Notes Due 2026 [Member]    
Title of 12(b) Security 4.875% Notes due 2026  
Trading Symbol HTFB  
Security Exchange Name NYSE  
6.25% Notes Due 2027 [Member]    
Title of 12(b) Security 6.25% Notes due 2027  
Trading Symbol HTFC  
Security Exchange Name NYSE