Stockholders' Equity - Summary of Stock Option Activity (Details) shares in Thousands	6 Months Ended
Jun. 30, 2022 $ / shares shares
Number of Options
Outstanding at December 31, 2021 \| shares	5,778
Granted \| shares	3,028
Exercised \| shares	(12)
Forfeited/expired \| shares	(158)
Outstanding at June 30, 2022 \| shares	8,636
Weighted-Average Exercise Price
Outstanding at December 31, 2021 \| $ / shares	$ 14.49
Granted \| $ / shares	14.95
Exercised \| $ / shares	1.19
Forfeited/expired \| $ / shares	22.02
Outstanding at June 30, 2022 \| $ / shares	$ 14.53

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(02)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
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-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

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-Name Accounting Standards Codification
-Topic 210
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