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Number Of Resellers

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Number of telecommunication carriers.

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Summary Of Significant Accounting Policies [Line Items]

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Amount of asset retirement obligations incurred during the period.

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Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Term of lessor's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Mar. 31, 2022 USD ($) item $ / shares shares	Mar. 31, 2021 USD ($) item shares	Mar. 31, 2020 USD ($) shares	Sep. 30, 2021	Dec. 31, 2020	Apr. 30, 2019
Summary Of Significant Accounting Policies [Line Items]
Number of carriers	2		2
Accounts receivable	$ 0	$ 4,000
Liabilities settled	$ 109,000	226,000
Wireless licenses term	10 years
Impairment charges	$ 0	0	$ 0
Impairment of long-lived assets	0	85,000	$ 46,000
Property and equipment, net	2,949,000	$ 3,574,000
Lease extension				10 years	10 years
Lease term					30 years
Tax benefits attributed to share-based compensation expense	$ 0
Potentially dilutive securities outstanding but excluded from computation of earnings per share \| shares	1,343,000	1,382,000	1,440,000
Property, Plant and Equipment
Summary Of Significant Accounting Policies [Line Items]
Impairment of long-lived assets			$ 35,000
Property and equipment, net		$ 0
Right Of Use Asset
Summary Of Significant Accounting Policies [Line Items]
Impairment of long-lived assets			11,000
Property and equipment, net			0
Minimum
Summary Of Significant Accounting Policies [Line Items]
Lease extension	3 years
Lease term				40 years	40 years
Accelerated vesting provision, change in control, purchase price (in dollars per share) \| $ / shares	$ 100
Maximum
Summary Of Significant Accounting Policies [Line Items]
Lease extension	10 years
Lease term				40 years	40 years
Advertising
Summary Of Significant Accounting Policies [Line Items]
Advertising and promotional expense	$ 89,000	$ 19,000	$ 33,000
Tier 1 Carrier Partner
Summary Of Significant Accounting Policies [Line Items]
Number of carriers	1	1
Customer Concentration Risk \| Sales Revenue, Services, Net \| Reseller
Summary Of Significant Accounting Policies [Line Items]
Number of resellers		1	1
Customer Concentration Risk \| Sales Revenue, Services, Net \| Domestic Carrier And Reseller
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage		17.00%	21.00%
Customer Concentration Risk \| Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Accounts receivable	$ 0
Customer Concentration Risk \| Accounts Receivable \| Tier 1 Carrier Partner
Summary Of Significant Accounting Policies [Line Items]
Number of carriers \| item		1
TeamConnect LLC
Summary Of Significant Accounting Policies [Line Items]
Ownership percentage						19.50%
Leased Premises
Summary Of Significant Accounting Policies [Line Items]
Liabilities settled	$ 100,000	$ 200,000
Revision of estimate		$ 100,000