Document and Entity Information
12 Months Ended
Dec. 31, 2018
Document and Entity Information [Abstract]  
Document Type 20-F
Amendment Flag false
Document Period End Date Dec. 31, 2018
Entity Registrant Name Allot Ltd.
Entity Central Index Key 0001365767
Current Fiscal Year End Date --12-31
Document Fiscal Period Focus FY
Document Fiscal Year Focus 2018
Entity Filer Category Accelerated Filer
Entity Shell Company false
Entity Emerging Growth Company false
Entity Voluntary Filers No
Entity Common Stock, Shares Outstanding 33,896,261
Entity Current Reporting Status Yes
Entity Well-known Seasoned Issuer No