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Marketable Securities	6 Months Ended
Marketable Securities	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	Marketable Securities As of September 30, 2019, the Company’s $27.2 million marketable securities balance consisted of available-for-sale commercial paper and short-term corporate bonds. Unrealized gains on marketable securities as of September 30, 2019 were not material. There were no unrealized losses on marketable securities as of September 30, 2019. There were no marketable securities as of March 31, 2019.