Annual report pursuant to Section 13 and 15(d)

Stock and Employee Benefit Plans - Narrative (Details)

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Stock and Employee Benefit Plans - Narrative (Details)
$ / shares in Units, $ in Millions
 12 Months Ended
Jun. 23, 2020
shares
Dec. 31, 2021
USD ($)
purchasePeriod
$ / shares
shares
Dec. 31, 2020
$ / shares
shares
Jun. 25, 2021
shares
Defined Benefit Plan Disclosure [Line Items]        
Number of options granted (shares)   3,182,696 2,311,481  
Weighted-average fair value (USD per share) | $ / shares   $ 2.04 $ 1.92  
Issuance of common stock resulting from purchase of employee stock purchase plan shares (shares)   64,257 69,544  
Unrecognized compensation costs related to nonvested awards | $   $ 8.1    
Weighted-average compensation cost recognition period   2 years 7 months 20 days    
2020 Plan        
Defined Benefit Plan Disclosure [Line Items]        
Common stock authorized for issuance (shares) 3,500,000     5,750,000
Additional shares reserved for future issuance (shares)       2,250,000
Maximum term of stock options   10 years    
Number of options granted (shares)   2,822,696    
2019 Plan        
Defined Benefit Plan Disclosure [Line Items]        
Shares available for grant under prior plan (shares) 1,579,678      
Stock available for future grant (shares)   3,282,399    
Executive Officers and Senior Leadership        
Defined Benefit Plan Disclosure [Line Items]        
Number of options granted (shares)   360,000    
Unrecognized compensation costs related to nonvested awards | $   $ 1.2    
Employee Stock        
Defined Benefit Plan Disclosure [Line Items]        
Common stock authorized for issuance (shares)   500,000    
Discount from market price (as a percent)   85.00%    
Number of purchase periods | purchasePeriod   2    
Term of purchase period   6 months