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Cover
Oct. 27, 2020
Sep. 16, 2020
Cover [Abstract]    
Document Type 8-K  
Document Period End Date Oct. 27, 2020  
Entity Registrant Name A10 NETWORKS, INC.  
Entity Incorporation, State or Country Code DE  
Entity File Number 001-36343  
Entity Tax Identification Number 20-1446869  
Entity Address, Address Line One 2300 Orchard Parkway  
Entity Address, City or Town San Jose  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 95131  
City Area Code 408  
Local Phone Number 325-8668  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Title of 12(b) Security Common stock, $0.00001 par value per share  
Trading Symbol ATEN  
Security Exchange Name NYSE  
Entity Emerging Growth Company false  
Amendment Flag   false
Entity Central Index Key   0001580808