Equity - Computation of Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to Via Renewables, Inc. stockholders	$ 5,195	$ 29,290	$ 8,450
Less: Dividend on Series A preferred stock	7,804	7,441	8,091
Net income (loss) attributable to stockholders of Class A common stock	$ (2,609)	$ 21,849	$ 359
Basic weighted average Class A common shares outstanding (in shares)	15,128	14,555	14,286
Basic earnings (loss) per share attributable to stockholders (in dollars per share)	$ (0.17)	$ 1.50	$ 0.03
Net (loss) income attributable to stockholders of Class A common stock	$ (2,609)	$ 21,849	$ 359
Diluted net (loss) income attributable to stockholders of Class A common stock	$ (2,609)	$ 21,849	$ 359
Basic weighted average Class A common shares outstanding (in shares)	15,128	14,555	14,286
Effect of dilutive restricted stock units (in shares)	0	160	282
Diluted weighted average shares outstanding (in shares)	15,128	14,715	14,568
Diluted earnings (loss) per share attributable to stockholders (in dollars per share)	$ (0.17)	$ 1.48	$ 0.02
Common Class B
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of diluted earnings per share (in shares)	20,000
Restricted Stock Units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of diluted earnings per share (in shares)	500