Annual report pursuant to Section 13 and 15(d)

Convertible Notes and Long-Term Debt (Details)

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