PROPERTY AND EQUIPMENT (Summary of Property and Equipment) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Property and equipment
Gross property and equipment	$ 34,990	$ 35,205
Less: accumulated depreciation and amortization	(23,524)	(23,836)
Net property and equipment	11,466	11,369
Land and land improvements
Property and equipment
Gross property and equipment	433	433
Buildings and building improvements
Property and equipment
Gross property and equipment	9,491	9,477
Furniture, fixtures and office equipment
Property and equipment
Gross property and equipment	7,650	7,372
Leasehold Improvements
Property and equipment
Gross property and equipment	490	340
Equipment leased to customers
Property and equipment
Gross property and equipment	4,997	4,997
Plant equipment
Property and equipment
Gross property and equipment	11,130	12,451
Vehicles
Property and equipment
Gross property and equipment	796
Construction in progress
Property and equipment
Gross property and equipment	$ 3	$ 135

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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