v3.20.4

Convertible Notes and Long-Term Debt (Details) - USD ($) |  |  |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 14, 2020 | Oct. 13, 2020 | Jul. 16, 2020 | Apr. 14, 2020 | Dec. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 09, 2019
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proceeds from issuance of convertible notes |  |  |  |  |  | $ 262,374,788 | $ 38,950,000 |
Convertible notes |  |  |  |  | $ 197,700,000 | 197,700,000 | 19,400,000 |
Proceeds from notes payable |  |  |  |  |  | 0 | 5,854,140 |
Convertible Debt Warrants |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Class of warrant or right outstanding (in shares) |  |  |  |  |  |  |  | 15,500,000
Warrant exercise price (in usd per share) |  |  |  |  |  |  |  | $ 3.05
Warrants, fair value |  |  |  |  |  |  |  | $ 400,000
Paycheck Protection Program Term Note |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate |  |  |  | 1.00% |  |  |  |
Long-term debt, gross |  |  |  |  | 1,411,000 | 1,411,000 | 0 |
Proceeds from notes payable |  |  |  | $ 1,400,000 |  |  |  |
Convertible Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  | $ 197,700,000 | $ 197,700,000 | 39,020,000 |
Convertible Notes | Senior Secured Convertible Notes Due 2024 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Face amount | $ 200,000,000.0 |  |  |  |  |  |  |
Interest rate | 4.00% |  |  |  |  |  |  |
Interest rate reduction |  |  |  |  | 2.75% | 2.75% |  |
Conversion price (in usd per share) |  |  |  |  | $ 35.29 | $ 35.29 |  |
Debt issuance costs | $ 6,600,000 |  |  |  |  |  |  |
Proceeds from issuance of convertible notes | $ 193,400,000 |  |  |  |  |  |  |
Convertible notes |  |  |  |  | $ 197,700,000 | $ 197,700,000 |  |
Change in fair value |  |  |  |  | (2,300,000) |  |  |
Convertible Notes | High Trail Convertible Note II |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Face amount |  |  | $ 70,000,000.0 |  |  |  |  |
Interest rate |  |  | 4.50% |  |  |  |  |
Conversion price (in usd per share) |  |  | $ 19.00 |  |  |  |  |
Debt issuance costs |  |  | $ 1,100,000 |  |  |  |  |
Proceeds from issuance of convertible notes |  |  | 68,900,000 |  |  |  |  |
Change in fair value |  |  |  |  |  | 52,900,000 |  |
Debt conversion, amount |  |  | $ 70,000,000.0 |  |  |  |  |
Debt conversion, amount |  | $ 121,800,000 |  |  |  |  |  |
Convertible debt, shares issued on conversion | 5,200,000 |  |  |  |  |  |  |
Convertible Notes | High Trail Convertible Note II | Workhorse Common Stock |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Share price (in usd per share) |  | $ 23.63 |  |  |  |  |  |
Convertible Notes | High Trail Convertible Note |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  | $ 41,000,000.0
Interest rate |  |  |  |  |  |  |  | 4.50%
Conversion price (in usd per share) |  |  |  |  |  |  |  | $ 3.05
Convertible notes |  |  |  |  | $ 0 | 0 | 39,000,000.0 | $ 38,500,000
Debt conversion, amount |  |  |  |  |  | $ 40,500,000 | $ 500,000 |
Convertible debt, shares issued on conversion |  |  |  |  |  | 14,400,000 | 200,000 |
Class of warrant or right outstanding (in shares) |  |  |  |  | 0 | 0 |  |
Long-term debt, gross |  |  |  |  | $ 0 | $ 0 | $ 40,500,000 |
Change in fair value |  |  |  |  |  | 74,100,000 | 1,000,000.0 |
Gain (loss) on extinguishment of debt |  |  |  |  |  |  | $ 100,000 |
Convertible Notes | High Trail Convertible Note | Interest Expense |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Loss on debt conversion |  |  |  |  |  | $ 35,900,000 |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 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(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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