Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation - Narrative (Details)

v3.22.0.1
Stock Based Compensation - Narrative (Details) - USD ($)
1 Months Ended 2 Months Ended 3 Months Ended 12 Months Ended
Jan. 04, 2022
Jan. 01, 2022
May 18, 2016
Jan. 31, 2022
Jun. 30, 2021
Mar. 31, 2021
Jan. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Aug. 31, 2019
May 31, 2018
Mar. 02, 2022
Jun. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Annual share reserve increase                           4.00%  
Total stock-based compensation                           $ 8,172,000 $ 6,786,000
Expected annual dividend yield                           0.00%  
Employee Stock Purchase Plan (ESPP)                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Common stock remaining for future issuance (in shares)                           1,735,611  
Total stock-based compensation                           $ 300,000 300,000
Purchase price of common stock, percentage     85.00%                        
Maximum portion of earning an employee may contribute to the ESPP Plan     15.00%                        
Maximum annual amount of fair market value of the company's common stock that a participant may accrue the rights to purchase     $ 25,000                        
Shares of common stock for future issuance (in shares)     500,000                        
Automatic increase to shares authorized as percentage of outstanding stock at end of preceding year     1.00%                        
Employee Stock Purchase Plan (ESPP) | Subsequent Event                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Increase in number of shares reserved for issuance (in shares)   500,000                          
Special Advisor to the Board                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Requisite service period         1 year                    
Total stock-based compensation                         $ 1,400,000    
Market Based Options                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Total stock-based compensation                           $ 1,100,000  
Granted (in shares)                           0  
Aggregate intrinsic value                           $ 0  
Aggregate intrinsic value of options exercisable                           $ 0 $ 65,000
Expected annual dividend yield                             0.00%
Granted (in dollars per share)                           $ 0  
Market Based Options | Special Advisor to the Board                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Total stock-based compensation                         1,000,000    
Service Based Options                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Total stock-based compensation                           $ 6,800,000  
Compensation not yet recognized                           $ 13,600,000  
Period for recognition                           2 years 7 months 6 days  
Granted (in shares)                           5,336,173  
Aggregate intrinsic value                           $ 200,000  
Aggregate intrinsic value of options exercisable                           200,000  
Intrinsic value of options exercised                           $ 500,000 $ 100,000
Options vested (in shares)                           3,147,750  
Weighted average exercise price (in dollars per share)                           $ 3.60  
Fair value of options vested in period                           $ 7,000,000 $ 3,300,000
Expected annual dividend yield                           0.00% 0.00%
Granted (in dollars per share)                           $ 3.18  
Service Based Options | Subsequent Event                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Award vesting period                       4 years      
Share-based Compensation Arrangement by Share-based Payment Award, Vested, Granted in Period, Gross       $ 2,700,000                      
Service Based Options | Subsequent Event | Tranche One                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Award vesting rights percentage 25.00%                            
Service Based Options | Subsequent Event | Tranche Two                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Award vesting period                       36 months      
Award vesting rights percentage 75.00%                            
Service Based Options | Special Advisor to the Board                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Total stock-based compensation                         $ 400,000    
Compensation not yet recognized                           $ 100,000  
Period for recognition                           6 months  
Service Based Options | Chief Financial Officer                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Granted (in shares)           500,000                  
Service Based Options | Chief Financial Officer | Subsequent Event                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Granted (in shares)                       400,000      
Service Based Options | Chief Executive Officer                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Annual base salary                 $ 35,568            
Vested (in dollars per share)                 $ 2.07            
Granted (in shares)                 464,432            
Service Based Options | Chief Executive Officer | Subsequent Event                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Granted (in shares)                       1,000,000      
Service Based Options | Chief Commercial Officer | Subsequent Event                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Granted (in shares) 400,000                            
Granted (in dollars per share) $ 1.70                            
Restricted Stock Units                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Award vesting period                           4 years  
2016 Plan                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Increase in number of shares reserved for issuance (in shares)     600,000       4,511,768       1,400,000        
Common stock remaining for future issuance (in shares)                           1,570,867  
2016 Plan | Stock options                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Award expiration period                           10 years  
2016 Plan | Stock options | Minimum | Employee                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Award vesting period                           3 years  
2016 Plan | Stock options | Minimum | Director                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Award vesting period                           1 year  
2016 Plan | Stock options | Maximum | Employee                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Award vesting period                           4 years  
2016 Plan | Stock options | Maximum | Director                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Award vesting period                           3 years  
2015 Plan                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Common stock remaining for future issuance (in shares)     464,476                        
2016 Second Amended Plan                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Increase in number of shares reserved for issuance (in shares)                   850,000          
Third Amended 2016 Plan                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Increase in number of shares reserved for issuance (in shares)               2,014,400