7. FINANCIAL INSTRUMENTS (Details)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Fair value measurements
Discount rate	0.148
Short-term investments	$ 15,061,000	$ 19,346,000
Long-term investments	4,117,000	8,997,000
Level 2 \| Marketable securities
Fair value measurements
Long-term investments	4,100,000
Other accrued expenses
Fair value measurements
Contingent consideration liability	3,900,000	3,700,000
Accrued expenses and other liabilities
Fair value measurements
Contingent consideration liability	0	492,000
Recurring
Fair value measurements
Assets	33,295,000	32,433,000
Liabilities	3,898,000	4,206,000
Recurring \| Money market funds
Fair value measurements
Money market funds	14,117,000	4,090,000
Recurring \| Marketable securities
Fair value measurements
Marketable securities	19,178,000	28,343,000
Recurring \| Level 1
Fair value measurements
Assets	14,117,000	4,090,000
Recurring \| Level 1 \| Money market funds
Fair value measurements
Money market funds	14,117,000	4,090,000
Recurring \| Level 2
Fair value measurements
Assets	19,178,000	28,343,000
Recurring \| Level 2 \| Marketable securities
Fair value measurements
Marketable securities	19,178,000	28,343,000
Recurring \| Level 3
Fair value measurements
Liabilities	$ 3,898,000	$ 4,206,000

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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