Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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Purchase price of common stock expressed as a percentage of its fair value.

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Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

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Stock-Based Compensation - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for options to purchase common stock	183,390,904
Stock-based compensation expense	$ 1,772	$ 681
Unrecognized compensation expense related to stock options	1,400
Chief Executive Officer
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of common stock issued under stock options			241,958
Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation expense related to stock option	$ 23,500
Expected weighted-average period for recognition of compensation expense related	3 years 1 month 6 days
2013 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for options to purchase common stock	7,606,062
Common stock remained available for future grants	0
2013 Equity Incentive Plan \| Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for options to purchase common stock	7,606,062
2021 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for options to purchase common stock	4,801,482
Common stock remained available for future grants	4,801,482
2021 Equity Incentive Plan \| Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for options to purchase common stock	5,234,842
2021 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for options to purchase common stock	550,000
Purchase price of common stock, as a percentage of fair market value	85.00%
Maximum percentage of gross compensation to be invested by employees through payroll deductions	15.00%
Maximum number of shares an employee may purchase	4,750
Number of shares issued	0
Stock-based compensation expense	$ 100