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7. FINANCIAL INSTRUMENTS (Details) $ in Thousands	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Nov. 23, 2015
Fair value measurements
Discount rate	0.155		0.148
Short-term investments	$ 6,992	$ 9,717
Long-term investments	$ 3,345	5,792
Minimum
Fair value measurements
Probability rate	0
Maximum
Fair value measurements
Probability rate	0.15
Fair Value, Inputs, Level 2 \| Available-for-sale Securities
Fair value measurements
Short-term investments	$ 7,000
Long-term investments	3,300
Other accrued expenses
Fair value measurements
Contingent consideration liability	2,700	4,200
Fair Value, Measurements, Recurring
Fair value measurements
Assets	26,479	38,501
Liabilities	2,738	4,225
Fair Value, Measurements, Recurring \| Money Market Funds
Fair value measurements
Money market funds	16,142	22,992
Fair Value, Measurements, Recurring \| Available-for-sale Securities
Fair value measurements
Marketable securities	10,337	15,509
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 1
Fair value measurements
Assets	16,142	22,992
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 1 \| Money Market Funds
Fair value measurements
Money market funds	16,142	22,992
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 2
Fair value measurements
Assets	10,337	15,509
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 2 \| Available-for-sale Securities
Fair value measurements
Marketable securities	10,337	15,509
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 3
Fair value measurements
Liabilities	$ 2,738	$ 4,225