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Stock Bonus Plan - Summary of Change in Liability to Common Shares Subject to Repurchase and Associated Non-Cash Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |
Beginning Balance | $ 842 | $ 8,267
Non-cash compensation from ratable vesting | 41 | 2,712
Non-cash compensation from change in fair value of liability | 2 | 2,457
Other stock activity, net | 516 | (786)
Reclassification upon modification | 0 | (11,808)
Ending balance | $ 1,401 | $ 842

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- Definition Common shares subject to repurchase. + References No definition available. + Details
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Balance Type: | credit
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- Definition Non-cash compensation from change in fair value of liability. + References No definition available. + Details
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- Definition Non-cash compensation from ratable vesting. + References No definition available. + Details
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- Definition Other stock activity, net. + References No definition available. + Details
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- Definition Reclassification upon modification. + References No definition available. + Details
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Period Type: | duration

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- References No definition available. + Details
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