Quarterly report pursuant to Section 13 or 15(d)

Merger with NHIC (Details)

v3.21.2
Merger with NHIC (Details)
$ / shares in Units, $ in Thousands
 2 Months Ended 9 Months Ended
Jul. 16, 2021
USD ($)
shares
Mar. 31, 2020
USD ($)
Sep. 30, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
$ / shares
shares
Business Acquisition [Line Items]        
Common Stock, Par or Stated Value Per Share | $ / shares     $ 0.0001 $ 0.0001
Issuance of common stock in connection with the closing of the Merger (in shares)     10,391,513  
Earn-out shares issuable upon achieving certain milestones     15,000,000  
Common Stock Issuable Upon Conversion of Temporary Equity       80,873,772
Conversion ratio     1  
Exchange ratio     0.378  
Shares cancelled     98,524  
Number of stock options outstanding     21,310,677 18,804,634
Gross proceeds received from Merger | $     $ 84,945  
Common stock, issued     142,418,469 9,845,192
Common stock, outstanding     142,418,469 9,845,192
Warrants to purchase shares of common stock     14,325,000 1,938,096
Payments of Stock Issuance Costs | $     $ 33,968  
NewHold Investment Corp        
Business Acquisition [Line Items]        
Goodwill | $ $ 0      
Number of shares 94,276,850      
Exchange ratio 0.378      
Shares cancelled 58,828,853      
Number of stock options outstanding 22,227,710      
Gross proceeds received from Merger | $ $ 84,900      
Percentage owned by shareholders 92.70%      
Payments of financing costs | $     35,700  
Payments of Stock Issuance Costs | $     $ 700  
NewHold Investment Corp | New Hold Investment Corporation, Inc        
Business Acquisition [Line Items]        
Ownership percentage 7.30%      
Subscription Agreements        
Business Acquisition [Line Items]        
Earn-out shares issuable upon achieving certain milestones     15,000,000  
Received gross proceeds from PIPE investment | $     $ 300,000  
Series A-1 Preferred Stock        
Business Acquisition [Line Items]        
Common Stock Issuable Upon Conversion of Temporary Equity 24,369,613     24,369,613
Conversion ratio 1      
Series A Preferred Stock        
Business Acquisition [Line Items]        
Common Stock Issuable Upon Conversion of Temporary Equity 3,490,328     6,986,113
Conversion ratio 0.5      
Series B-1 Preferred Stock        
Business Acquisition [Line Items]        
Common Stock Issuable Upon Conversion of Temporary Equity 34,144,109     34,144,109
Conversion ratio 1      
Payments of Stock Issuance Costs | $   $ 100    
Series B Preferred Stock        
Business Acquisition [Line Items]        
Common Stock Issuable Upon Conversion of Temporary Equity 15,373,937     15,373,937
Conversion ratio 1