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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Spectrum revenue	$ 4,191	$ 1,919
Spectrum revenue
Disaggregation of Revenue [Line Items]
Spectrum revenue	4,191	1,919
Ameren | Spectrum revenue
Disaggregation of Revenue [Line Items]
Spectrum revenue	609	609
Evergy | Spectrum revenue
Disaggregation of Revenue [Line Items]
Spectrum revenue	966	581
Xcel Energy | Spectrum revenue
Disaggregation of Revenue [Line Items]
Spectrum revenue	1,887	0
Motorola | Spectrum revenue
Disaggregation of Revenue [Line Items]
Spectrum revenue	$ 729	$ 729

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