Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 206,218	$ 189,269
Less: accumulated depreciation	(69,462)	(60,250)
Property and equipment, net	136,756	129,019
Distribution System [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	157,707	145,357
Asset Retirement Obligation [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	2,180	2,015
Construction-in-Process [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	31,319	28,493
Equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	6,329	6,051
Vehicles [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	4,242	3,943
Furniture and Fixtures [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,246	1,267
Software [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	2,405	1,452
Leasehold Improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 790	$ 691

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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