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7. FINANCIAL INSTRUMENTS (Details) $ in Thousands	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Nov. 23, 2015
Fair value measurements
Discount rate	0.145		0.148
Short-term investments	$ 9,717	$ 15,061
Long-term investments	$ 5,792	4,117
Minimum
Fair value measurements
Discount rate	0.00
Maximum
Fair value measurements
Discount rate	0.15
Level 2 | Marketable securities
Fair value measurements
Short-term investments	$ 9,700
Long-term investments	5,800
Other accrued expenses
Fair value measurements
Contingent consideration liability	4,200	3,900
Recurring
Fair value measurements
Assets	38,501	33,295
Liabilities	4,225	3,898
Recurring | Money market funds
Fair value measurements
Money market funds	22,992	14,117
Recurring | Marketable securities
Fair value measurements
Marketable securities	15,509	19,178
Recurring | Level 1
Fair value measurements
Assets	22,992	14,117
Recurring | Level 1 | Money market funds
Fair value measurements
Money market funds	22,992	14,117
Recurring | Level 2
Fair value measurements
Assets	15,509	19,178
Recurring | Level 2 | Marketable securities
Fair value measurements
Marketable securities	15,509	19,178
Recurring | Level 3
Fair value measurements
Liabilities	$ 4,225	$ 3,898

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