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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business 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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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Property and Equipment - Components of Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 16,088	$ 14,646
Less accumulated depreciation	13,379	11,082
Property and equipment, net before construction work in progress	2,709	3,564
Construction in process	240	10
Property and equipment, net	2,949	3,574
Network sites and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 14,588	13,235
Property and equipment, net		0	$ 0
Network sites and equipment \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Network sites and equipment \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 639	592
Computer software \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	1 year
Computer software \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 204	293
Computer equipment \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Computer equipment \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years
Furniture and fixture and other equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 415	284
Furniture and fixture and other equipment \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	2 years
Furniture and fixture and other equipment \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Property and equipment, gross	$ 242	$ 242