Annual report [Section 13 and 15(d), not S-K Item 405]

Stock-Based Compensation - Additional Information (Details)

v3.25.1
Stock-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Jan. 01, 2025
Jun. 01, 2023
Jan. 01, 2023
Dec. 31, 2024
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)       11,712,000      
Granted (in dollars per share)       $ 0.05      
Unvested options granted (in shares)       14,100,000      
Unrecognized compensation cost       $ 0.7      
Unrecognized weighted average period       2 years 2 months 12 days      
Options outstanding (in shares)       26,823,000 24,435,000    
Weighted average exercise price (in dollars per share)       $ 0.14 $ 0.32    
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 2013 Plan and 2023 Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Unvested stock options (in shares)       6,750,000      
Operating Income (Loss)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock based compensation expense       $ 0.3 $ 0.2    
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 to shares authorized for issuance under the Plan as percent of common stock outstanding percentage             4.00%
Annual increase to shares authorized for issuance under the Plan (in shares)             4,000,000
Additional Shares authorized under plan (in shares)     4,000,000        
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   20,626,000      
Equity incentive plan, term   10 years          
Annual increase to shares authorized for issuance under the Plan as percent of common stock outstanding percentage   4.00%          
Equity incentive plan, automatic annual plan increase after adoption, term   10 years          
2023 Plan | Subsequent Event              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Additional Shares authorized under plan (in shares) 7,370,547            
Issued (in shares) 14,950,000            
Issued, weighted average exercise price (in dollars per share) $ 0.04