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Stock-based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Stock-based compensation |  |  |  |
Proceeds from issuances of common stock from employee stock purchase plans |  |  | $ 337 | $ 755
Unrecognized compensation cost related to outstanding options | $ 36,243 |  | $ 36,243 |
Period over which unrecognized compensation cost is expected to be recognized as expense |  |  | 2 years 4 months 24 days |
Restricted stock units |  |  |  |
Stock-based compensation |  |  |  |
Vesting period (in years) |  |  | 4 years |
Total fair value of shares vested |  |  | $ 10,020 | $ 11,165
Stock options |  |  |  |
Stock-based compensation |  |  |  |
Weighted-average grant date fair value per share of grants (in dollars per share) |  |  |  | $ 12.60
Employee stock purchase plan. |  |  |  |
Stock-based compensation |  |  |  |
Employee Stock Purchase Plan, Purchase Price Percentage |  |  | 85.00% |
Issuance for employee stock purchase plan, shares |  |  | 22,627 |
Proceeds from issuances of common stock from employee stock purchase plans |  |  | $ 337 |
Employee stock purchase plan compensation expenses | $ 28 | $ 58 | $ 88 | $ 195

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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