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v3.22.1

Convertible Debt - Narrative (Details) |  |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 26, 2019 USD ($) shares | Mar. 01, 2019 USD ($) day $ / shares | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Jan. 01, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 26, 2019 KRW (₩)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Accumulated deficit |  |  | $ (1,287,103,438) |  |  | $ (1,209,855,522) |
Convertible senior notes |  |  | 16,207,864 |  |  | 14,959,647 |
Non-cash interest expense |  |  | 313,488 | $ 513,034 |  |  |
Additional paid-in capital |  |  | (1,642,419,819) |  |  | $ (1,609,589,797) |
Accounting Standards Update 2020-06 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Accumulated deficit |  |  |  |  | $ 1,800,000 |  |
Convertible senior notes |  |  |  |  | 1,500,000 |  |
Additional paid-in capital |  |  |  |  | $ 3,300,000 |  |
Convertible senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Original principal amount |  |  | 78,500,000 |  |  |  |
Unamortized debt issuance cost |  |  | 296,051 |  |  |  |
Convertible Debt |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unamortized debt issuance cost |  |  | $ 2,200,000 |  |  |  |
Convertible Debt | Convertible senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Original principal amount |  | $ 78,500,000 |  |  |  |  |
Stated interest rate |  | 6.50% | 6.50% |  |  |  |
Proceeds from issuance of debt |  | $ 75,700,000 |  |  |  |  |
Debt instrument, convertible conversion price (in dollars per share) | $ / shares |  | $ 5.38 |  |  |  |  |
Debt instrument, convertible, threshold percentage of stock price trigger |  | 130.00% |  |  |  |  |
Debt instrument, convertible, threshold trading days | day |  | 20 |  |  |  |  |
Debt instrument, convertible, threshold consecutive trading days | day |  | 30 |  |  |  |  |
Debt instrument, redemption price percentage |  | 100.00% |  |  |  |  |
Debt instrument, unamortized discount |  | $ 16,300,000 |  |  |  |  |
Debt instrument, effective interest rate |  |  | 13.10% |  |  |  |
Unamortized debt issuance cost |  |  | $ 592,000 |  |  |  |
Non-cash interest expense |  |  | 313,000 | 463,000 |  |  |
Interest expense, contractual interest |  |  | 267,000 | $ 267,000 |  |  |
Debt instrument, convertible, conversion ratio |  | 0.1858045 |  |  |  |  |
Convertible Debt | December 2019 Bonds |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Original principal amount | $ 4,100,000 |  |  |  |  |  | ₩ 4,700,000,000
Stated interest rate | 1.00% |  |  |  |  |  | 1.00%
Proceeds from issuance of debt | $ 4,000,000 |  |  |  |  |  |
Debt conversion, converted instrument, shares issued (in shares) | shares | 1,009,450 |  |  |  |  |  |
Debt instrument, effective interest rate |  |  |  | 6.20% |  |  |
Non-cash interest expense |  |  |  | $ 59,000 |  |  |
Interest expense, contractual interest |  |  |  | $ 9,000 |  |  |
Conversion of carrying value |  |  | $ 4,400,000 |  |  |  |
Convertible Debt | December 2019 Bonds | Initial Conversion Price |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, convertible, conversion ratio | 0.0002147766 |  |  |  |  |  |

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- Definition Amount of excess of issue price over par or stated value of stock and from other transaction involving stock or stockholder. Includes, but is not limited to, additional paid-in capital (APIC) for common and preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 2: 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 3: 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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