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Investments - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Dec. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Mar. 31, 2022
Investments [Line Items]
Cash and cash equivalents	$ 20,196,000	$ 20,196,000	$ 30,269,000	$ 28,675,000
Purchase of equity securities		1,061,000	0
Sale of equity securities		384,000	$ 0
Fair value of investment in equity securities	600,000	600,000
Unrealized loss on investment in equity securities		100,000
Maximum [Member]
Investments [Line Items]
Unrealized gains on short-term investments	100,000	100,000
Interest income on investments	100,000	200,000
Three Month Treasury Bills [Member]
Investments [Line Items]
Investments	$ 10,000,000.0	$ 10,000,000.0

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