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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Spectrum revenue	$ 1,551	$ 1,052	$ 3,076	$ 1,660
Spectrum revenue | Ameren Corporation
Disaggregation of Revenue [Line Items]
Spectrum revenue	182	152	338	304
Spectrum revenue | Evergy
Disaggregation of Revenue [Line Items]
Spectrum revenue	385	274	771	548
Spectrum revenue | Xcel Energy
Disaggregation of Revenue [Line Items]
Spectrum revenue	802	444	1,603	444
Spectrum revenue | Motorola
Disaggregation of Revenue [Line Items]
Spectrum revenue	$ 182	$ 182	$ 364	$ 364

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