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v3.21.2

Summary of Significant Accounting Policies - Accounting Pronouncements (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Accumulated deficit | $ (1,254,272) | $ (1,254,272) |  | $ (929,318) |
Convertible Notes |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Interest expense | 1,925 | 5,769 |  |  |
Outstanding principle | 287,500 | 287,500 | $ 287,500 |  |
Net carrying amount | 280,085 | 280,085 |  |  |
Previously reported |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Interest expense | $ 2,400 | $ 7,000 |  |  |
Previously reported | Convertible Notes |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Outstanding principle |  |  |  | 287,500 |
Unamortized debt discount and issuance cost |  |  |  | (85,007) |
Net carrying amount |  |  |  | 202,493 |
Additional paid-in-capital |  |  |  | (1,411,286) |
Accumulated deficit |  |  |  | (929,318) |
ASU 2016-13 |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Cumulative effect adjustment |  |  |  |  | $ 400
Accounting Standards Update 2020-06 | Convertible Notes |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Outstanding principle |  |  |  | 287,500 |
Unamortized debt discount and issuance cost |  |  |  | (8,333) |
Net carrying amount |  |  |  | 279,167 |
Additional paid-in-capital |  |  |  | (1,328,414) |
Accumulated deficit |  |  |  | (923,120) |
Accounting Standards Update 2020-06 | Adoption Adjustment |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Reduction in net loss from continuing operations per share | $ 0.03 | $ 0.08 |  |  |
Accounting Standards Update 2020-06 | Adoption Adjustment | Convertible Notes |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Unamortized debt discount and issuance cost |  |  |  | 76,674 |
Net carrying amount |  |  |  | 76,674 |
Additional paid-in-capital |  |  |  | 82,872 |
Accumulated deficit |  |  |  | $ 6,198 |

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- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 65 -Paragraph 15 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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