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7. FINANCIAL INSTRUMENTS (Details)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Nov. 23, 2015
Fair value measurements
Discount rate		0.161	0.148
Minimum
Fair value measurements
Probability rate		0.25
Maximum
Fair value measurements
Probability rate		0.75
Fair Value, Inputs, Level 2 \| Available for sale Securities
Fair value measurements
Long-term investments	$ 0
Other accrued expenses
Fair value measurements
Contingent consideration liability	0	$ 160,000
Fair Value, Measurements, Recurring
Fair value measurements
Assets	4,836,000	5,676,000
Liabilities		160,000
Fair Value, Measurements, Recurring \| Money Market Funds
Fair value measurements
Money market funds	4,800,000	5,700,000
Assets	4,836,000	5,676,000
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 1
Fair value measurements
Assets	4,836,000	5,676,000
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 1 \| Money Market Funds
Fair value measurements
Money market funds	4,800,000
Assets	$ 4,836,000	5,676,000
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 3
Fair value measurements
Liabilities		$ 160,000