4. BALANCE SHEET DETAIL - Property and equipment, net (Details) - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Property and equipment, net:
Property and equipment, gross	$ 30,888,000	$ 31,712,000
Less: Accumulated depreciation	(22,769,000)	(22,711,000)
Total property and equipment, net	8,119,000	9,001,000
Depreciation	1,200,000	1,200,000	$ 934,000
Computer and other equipment
Property and equipment, net:
Property and equipment, gross	18,191,000	19,086,000
Software
Property and equipment, net:
Property and equipment, gross	4,086,000	4,058,000
Land
Property and equipment, net:
Property and equipment, gross	3,900,000	3,900,000
Building and building improvements
Property and equipment, net:
Property and equipment, gross	3,735,000	3,718,000
Furniture and fixtures
Property and equipment, net:
Property and equipment, gross	102,000	102,000
Leasehold improvements
Property and equipment, net:
Property and equipment, gross	$ 874,000	$ 848,000