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v3.21.1

Nature of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 2 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 28, 2021 | Jan. 31, 2021 | Nov. 30, 2020 | Aug. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Feb. 28, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | May 31, 2020 | May 29, 2020 | May 18, 2020
Liquidity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock sold |  |  | 43,700,000 | 35,276,250 | 46,000,000 | 10,000,000 |  | 4,400,000 |  |  |  |  |  |  |  |  |  |  |  | 79,000,000.0 |  |  |  |  |
Share Price |  |  | $ 22.25 | $ 10.25 | $ 2.75 | $ 2.35 |  |  |  |  |  | $ 2.75 |  |  | $ 2.35 |  |  |  |  |  | $ 2.75 |  |  |  |
Proceeds from public offerings, net of transaction costs |  |  | $ 927,300 | $ 344,400 | $ 120,400 | $ 23,500 |  |  |  |  |  |  |  |  | $ 23,498 | $ (269) | $ 28,265 | $ 344,398 | $ 38,098 | $ 1,271,714 | $ 158,343 | $ 7,195 |  |  |
Common stock, shares issued |  |  |  |  | 318,637,560 |  |  | 473,977,469 |  |  |  | 318,637,560 |  |  |  |  |  |  |  | 473,977,469 | 318,637,560 |  |  |  |
Cash and cash equivalents |  |  |  |  | $ 139,496 | 39,336 |  | $ 1,312,404 | $ 448,140 | $ 152,492 | $ 74,340 | $ 139,496 | $ 43,275 | $ 19,845 | 39,336 | 152,492 | 19,845 | 448,140 | 43,275 | $ 1,312,404 | $ 139,496 |  |  |  |
Restricted cash |  |  |  |  |  |  |  | 321,900 |  |  |  |  |  |  |  |  |  |  |  | 321,900 |  |  |  |  |
Net loss attributable to common shareholders |  |  |  |  |  |  |  | (484,105) | (65,217) | (9,414) | (37,445) | (19,277) | (18,366) | (17,351) | (30,560) | (46,859) | (47,911) | (112,076) | (66,277) | (596,181) | (85,555) | (85,660) |  |  |
Net loss attributable to common shareholders |  |  |  |  |  |  |  | 484,105 | 65,217 | 9,414 | 37,445 | 19,277 | 18,366 | 17,351 | 30,560 | 46,859 | 47,911 | 112,076 | 66,277 | 596,181 | 85,555 | 85,660 |  |  |
Net cash used in operating activities |  |  |  |  |  |  |  |  |  |  | 60,402 |  |  |  | 35,699 | 111,891 | 48,328 | 156,506 | 54,141 | 155,476 | 53,324 | $ 58,350 |  |  |
Accumulated deficit |  |  |  |  | (1,350,307) | (1,297,072) |  | (1,946,488) | (1,462,377) | (1,397,160) | (1,387,752) | (1,350,307) | (1,332,259) | (1,314,425) | (1,297,072) | (1,397,160) | (1,314,425) | (1,462,377) | (1,332,259) | (1,946,488) | (1,350,307) |  |  |  |
Total operating lease, liabilities |  |  |  |  |  |  |  | 113,938 |  |  |  |  |  |  |  |  |  |  |  | 113,938 |  |  |  |  |
Total finance lease liabilities |  |  |  |  |  |  |  | 5,396 |  |  |  |  |  |  |  |  |  |  |  | 5,396 |  |  |  |  |
Operating lease liabilities |  |  |  |  | 9,428 | 7,042 |  | 14,314 | 10,609 | 9,453 | 8,959 | 9,428 | 8,666 | 7,512 | 7,042 | 9,453 | 7,512 | 10,609 | 8,666 | 14,314 | 9,428 |  |  |  |
Finance lease liabilities |  |  |  |  | $ 226 | $ 236 |  | 903 | $ 374 | $ 345 | $ 204 | $ 226 | $ 310 | $ 266 | $ 236 | $ 345 | $ 266 | $ 374 | $ 310 | 903 | $ 226 |  |  |  |
Incremental term loan |  |  |  |  |  |  |  | 175,400 |  |  |  |  |  |  |  |  |  |  |  | 175,400 |  |  |  |  |
Short-term borrowing |  |  |  |  |  |  |  | 25,400 |  |  |  |  |  |  |  |  |  |  |  | 25,400 |  |  |  |  |
Convertible senior notes |  |  |  |  |  |  |  | 85,600 |  |  |  |  |  |  |  |  |  |  |  | 85,600 |  |  |  |  |
Working capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,400,000 |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.50% |  |
Finance obligation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liquidity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total finance lease liabilities |  |  |  |  |  |  |  | 181,553 |  |  |  |  |  |  |  |  |  |  |  | 181,553 |  |  |  |  |
Finance lease liabilities |  |  |  |  |  |  |  | $ 32,700 |  |  |  |  |  |  |  |  |  |  |  | $ 32,700 |  |  |  |  |
3.75% Convertible Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liquidity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Price |  |  |  |  |  |  |  | $ 33.91 |  |  |  |  |  |  |  |  |  |  |  | $ 33.91 |  |  |  |  |
Principal amount |  |  |  |  |  |  |  | $ 212,463 |  |  |  |  |  |  |  |  |  |  |  | $ 212,463 |  |  | $ 212,463 | $ 12,500 | $ 200,000
Interest rate (as a percent) |  |  |  |  |  |  |  | 3.75% |  |  |  |  |  |  |  |  |  |  |  | 3.75% |  |  | 3.75% | 3.75% | 3.75%
Private placement | 3.75% Convertible Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liquidity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 212,500 |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.75% |  |
Subsequent event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liquidity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock sold |  |  |  |  |  |  | 32.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent event | 3.75% Convertible Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liquidity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 3.75% | 3.75% |  |  |  |  | 3.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent event | SK Holdings Co LTD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liquidity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock sold | 54,996,188 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from public offerings, net of transaction costs | $ 1,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued | 54,966,188 |  |  |  |  |  | 54,966,188 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Per share price of shares of common stock | $ 29.2893 |  |  |  |  |  | $ 29.2893 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent event | Public Offerings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liquidity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock sold | 32,200,000 | 32,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Price | $ 65.00 | $ 65.00 |  |  |  |  | $ 65.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from public offerings, net of transaction costs | $ 1,800,000 | $ 1,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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