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Related Party Transactions (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jul. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021	Aug. 27, 2020	Apr. 30, 2019
Related Party Transaction [Line Items]
Prepayments received		$ 60,759,000	$ 54,678,000	$ 2,983,000
Revenue recognized		1,919,000	1,084,000
TeamConnect LLC
Related Party Transaction [Line Items]
Ownership percentage						19.50%
Spectrum revenue
Related Party Transaction [Line Items]
Revenue recognized		700,000	700,000	700,000
Motorola
Related Party Transaction [Line Items]
Purchase of equipment		1,400,000	0	0
Payable to related parties		500,000	100,000
Motorola | Frequency Relocation Agreement
Related Party Transaction [Line Items]
Agreement amount		1,000,000
Expenses from transactions with related party		100,000
Rachelle B. Chong
Related Party Transaction [Line Items]
Consulting fees		100,000	100,000	100,000
Payable to related parties		0	0
Brian D. McAuley
Related Party Transaction [Line Items]
Consulting fees		40,000	40,000	23,000
Payable to related parties		$ 0	0
Extension term	12 months
Consulting agreement, cash compensation per year					$ 40,000
TeamConnect LLC
Related Party Transaction [Line Items]
Service fee term		24 months
TeamConnect LLC | PDVConnect
Related Party Transaction [Line Items]
Service fee term		48 months
Prepayments received		$ 0	0
Goosetown And A BEEP | PDVConnect
Related Party Transaction [Line Items]
Consulting fees		$ 55,000	$ 60,000	$ 600,000

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