Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Additional Information (Details)

v3.24.1
Stock-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 12 Months Ended
Jun. 01, 2023
Jan. 01, 2023
Mar. 30, 2022
Mar. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Jun. 11, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock option cancelled (in shares)         3,346,000    
Granted (in dollars per share)         $ 0.04    
Unvested options granted (in shares)         7,950,000    
Unrecognized compensation cost         $ 0.2    
Unrecognized weighted average period         2 years 1 month 6 days    
Options outstanding (in shares)         24,435,000 19,831,000  
Weighted average exercise price (in dollars per share)         $ 0.32 $ 0.46  
Exercised (in shares)         0    
Equity Option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock option, maximum term         10 years    
Exercised (in shares)         0 0  
Options Outside the Amended 2013 Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options vested (in shares)         4,250,000    
Unvested stock options (in shares)         6,750,000    
Options outstanding (in shares)         18,050,000    
Weighted average exercise price (in dollars per share)         $ 0.4    
Operating Income (Loss)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock based compensation expense         $ 0.2 $ 1.0  
Minimum | Equity Option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period         2 years    
Maximum | Equity Option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period         4 years    
Amended 2013 Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares authorized under plan (in shares)   34,976,000       30,976,000  
Annual increase in shares available for issuance as percent of total shares outstanding percentage             4.00%
Annual increase to shares authorized for issuance under the Plan (in shares)             4,000,000
Additional shares authorized (in shares)   4,000,000          
Stock option cancelled (in shares)       9,000,000      
Increase (decrease) in number of shares authorized,     8,000,000        
Amended 2013 Plan | Equity Option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock option, maximum term         10 years    
Amended 2013 Plan | Minimum | Equity Option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period         2 years    
Amended 2013 Plan | Maximum | Equity Option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period         4 years    
2023 Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares authorized under plan (in shares) 34,976,000       34,726,000    
Equity incentive plan, term 10 years            
Annual increase in shares available for issuance as percent of total shares outstanding percentage 4.00%            
Equity incentive plan, automatic annual plan increase after adoption, term 10 years