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Related Party Transactions (Details) - USD ($)	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Aug. 27, 2020
Related Party Transaction [Line Items]
Contract liability	$ 54,678,000	$ 2,983,000	$ 3,462,000
Revenue recognized	$ 1,084,000	729,000
Extension term	12 months
Early termination, term	30 days
Motorola
Related Party Transaction [Line Items]
Purchase of equipment	$ 0	0	11,000
Payable to related parties	120,000	120,000
Rachelle B. Chong
Related Party Transaction [Line Items]
Consulting fees	144,000	132,000
Payable to related parties	0	0
Brian D. McAuley
Related Party Transaction [Line Items]
Consulting fees	40,000	23,000
Payable to related parties	$ 0	0
Consulting agreement, cash compensation per year				$ 40,000
Shares issued for services	18,761
Spectrum revenue
Related Party Transaction [Line Items]
Revenue recognized	$ 729,000	729,000	729,000
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
Contract liability	$ 0	32,000
Goosetown And A BEEP | PDVConnect
Related Party Transaction [Line Items]
Consulting fees	$ 60,000	$ 576,000	$ 974,000

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