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Concentration of Credit Risk	12 Months Ended
Concentration of Credit Risk	Mar. 31, 2021
Concentration of Credit Risk [Abstract]
Concentration of Credit Risk	6. Concentration of Credit Risk We maintain our cash and cash equivalent balances in either bank depository accounts or money market mutual funds. The money market mutual funds are limited to investments in low-risk securities such as U.S. or government agency obligations, or repurchase agreements secured by such securities.