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7. FINANCIAL INSTRUMENTS (Details)	Sep. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Nov. 23, 2015
Fair value measurements
Discount rate	15.9		14.8
Short-term investments	$ 651,000	$ 3,363,000
Minimum
Fair value measurements
Probability rate	0.25
Maximum
Fair value measurements
Probability rate	0.70
Fair Value, Inputs, Level 2 | Available-for-sale Securities
Fair value measurements
Short-term investments	$ 651,000
Other accrued expenses
Fair value measurements
Contingent consideration liability	728,000	1,100,000
Fair Value, Measurements, Recurring
Fair value measurements
Assets	11,429,000	11,159,000
Liabilities	728,000	1,052,000
Fair Value, Measurements, Recurring | Money Market Funds
Fair value measurements
Money market funds	10,778,000	7,796,000
Fair Value, Measurements, Recurring | Available-for-sale Securities
Fair value measurements
Marketable securities	651,000	3,363,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair value measurements
Assets	10,778,000	7,796,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Money Market Funds
Fair value measurements
Money market funds	10,778,000	7,796,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair value measurements
Assets	651,000	3,363,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Available-for-sale Securities
Fair value measurements
Marketable securities	651,000	3,363,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair value measurements
Liabilities	$ 728,000	$ 1,052,000

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