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4. BALANCE SHEET DETAIL - Property and equipment, net (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021
Property and equipment, net:
Property and equipment, gross	$ 31,216,000		$ 31,216,000		$ 31,070,000
Less: Accumulated depreciation	(23,904,000)		(23,904,000)		(23,742,000)
Total property and equipment, net	7,312,000		7,312,000		7,328,000
Depreciation	193,000	$ 197,000	577,000	$ 787,000
Computer and other equipment
Property and equipment, net:
Property and equipment, gross	18,175,000		18,175,000		18,359,000
Software
Property and equipment, net:
Property and equipment, gross	4,426,000		4,426,000		4,097,000
Land
Property and equipment, net:
Property and equipment, gross	3,900,000		3,900,000		3,900,000
Building and building improvements
Property and equipment, net:
Property and equipment, gross	3,735,000		3,735,000		3,735,000
Furniture and fixtures
Property and equipment, net:
Property and equipment, gross	102,000		102,000		102,000
Leasehold improvements
Property and equipment, net:
Property and equipment, gross	$ 878,000		$ 878,000		$ 877,000

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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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