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Investments and Fair Value Measurement - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Investments [Line Items]
Investments in debt securities	$ 4,900,000
Cash and cash equivalents	15,301,000	$ 28,675,000
Interest income on investments in debt securities	300,000
Purchase of equity securities	1,061,000	0
Sale of equity securities	384,000	$ 0
Fair value of investment in equity securities	700,000
Maximum [Member]
Investments [Line Items]
Unrealized gains on investments in debt securities	100,000
Unrealized gain on investment in equity securities	$ 100,000

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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