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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2020
Apr. 21, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 0-28082    
Entity Registrant Name KVH Industries, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 05-0420589    
Entity Address, Address Line One 50 Enterprise Center    
Entity Address, City or Town Middletown    
Entity Address, State or Province RI    
Entity Address, Postal Zip Code 02842    
City Area Code 401    
Local Phone Number 847-3327    
Title of 12(b) Security Common Stock, $0.01 par value per share    
Trading Symbol KVHI    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 144,621,573
Entity Common Stock, Shares Outstanding   18,485,430  
Amendment Description This Amendment No. 1 to Form 10-K (this “Amendment”) amends our Annual Report on Form 10-K for the fiscal year ended December 31, 2020 originally filed with the Securities and Exchange Commission on March 3, 2021 (the “Original Filing”). We are filing this Amendment to amend Part III, Items 10 through 14 of the Original Filing to include information previously omitted from the Original Filing in reliance on General Instruction G(3) to Form 10-K and to file exhibits required by this Amendment. Accordingly, Part III and Item 15 of Part IV of the Original Filing are hereby amended and restated as set forth below.Except as described above, this Amendment does not amend, update or change any other items or disclosures in the Original Filing, and accordingly, should be read in conjunction with the Original Filing. Except as stated herein, this Amendment does not reflect events occurring after the date of the Original Filing, and no attempt has been made in this Amendment to modify or update other disclosures made in the Original Filing.As required by Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), new certifications by our principal executive officer and our principal financial officer are filed as exhibits to this Amendment under Item 15 of Part IV hereof    
Amendment Flag true    
Entity Central Index Key 0001007587    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY