XML 90 R78.htm IDEA: XBRL DOCUMENT v3.20.4
FAIR VALUE OF FINANCIAL INSTRUMENTS: - Narrative (Details) - USD ($)
9 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Mar. 31, 2020
Fair Value Disclosures [Abstract]      
Strategic investments without readily determinable fair values $ 5,700,000   $ 3,500,000
Asset impairment charges $ 0 $ 0