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Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Mar. 01, 2022
Jun. 30, 2021
Class of Stock [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Document Transition Report false    
Entity File Number 001-36559    
Entity Registrant Name Via Renewables, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 46-5453215    
Entity Address, Address Line One 12140 Wickchester Ln    
Entity Address, Address Line Two Suite 100    
Entity Address, City or Town Houston    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77079    
City Area Code 713    
Local Phone Number 600-2600    
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 false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 135
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant's definitive Proxy Statement in connection with the 2022 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K.
    
Amendment Flag false    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001606268    
Current Fiscal Year End Date --12-31    
Common Class A      
Class of Stock [Line Items]      
Title of 12(b) Security Class A common stock, par value $0.01 per share    
Trading Symbol VIA    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   15,659,683  
Common Class B      
Class of Stock [Line Items]      
Entity Common Stock, Shares Outstanding   20,000,000  
Series A Preferred Stock      
Class of Stock [Line Items]      
Title of 12(b) Security 8.75% Series A Fixed-to-Floating RateCumulative Redeemable Perpetual Preferred Stock, par value $0.01 per share    
Trading Symbol VIASP    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   3,567,543