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Nature of Business - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Dec. 03, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Accumulated deficit		$ (115,601)	$ (96,734)
Cash and cash equivalents		$ 374,205	$ 386,569
Common stock, shares, issued		34,903,497	34,801,537
Liquidity and Capital Resources [Member]
Cash and cash equivalents		$ 374,200
Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock outstanding				30,415,337	15,714,283
IPO [Member]
Offering price per share	$ 21.00
Net proceeds after deducting underwriting discounts and commissions and offering expenses	$ 255,300
Common stock, shares, issued	13,225,000
IPO [Member] | Common Stock [Member]
Conversion of preferred stock, common shares issued	20,758,098
IPO [Member] | Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock outstanding	77,074,884

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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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