Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation - Narrative (Details)

v3.24.1
Stock Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Jan. 01, 2024
May 18, 2016
Mar. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Apr. 05, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total stock-based compensation       $ 3,475 $ 7,554  
Expected annual dividend yield       0.00%    
Service Based Options            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total stock-based compensation       $ 3,300 $ 7,400  
Aggregate intrinsic value of options exercisable       0    
Options vested (in shares)         2,229  
Weighted average exercise price (in dollars per share)         $ 2,201  
Fair value of options vested in period       3,400 $ 9,600  
Compensation not yet recognized       $ 2,800    
Period for recognition       1 year 8 months 12 days    
Expected annual dividend yield       0.00% 0.00%  
Exercisable stock options (in shares)       7,211 5,734  
Weighted average exercise price (in dollars per share)       $ 3,192 $ 6,789  
Weighted average remaining contractual term       8 years 3 months 18 days 6 years 8 months 12 days  
Service Based Options | Special Advisor to the Board            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total stock-based compensation     $ 4,300      
Market Based Options            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Exercisable stock options (in shares)       348    
Weighted average exercise price (in dollars per share)       $ 9,488    
Weighted average remaining contractual term       6 months    
Stock options with market-based vesting conditions granted (in shares)       0    
Stock options with market-based vesting conditions exercised (in shares)       0    
Stock options with market-based vesting conditions forfeited (in shares)       0    
Nonvested restricted (in shares)       0 0  
2016 Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Annual share reserve increase       4.00%    
Common stock remaining for future issuance (in shares)       450    
2016 Plan | Subsequent Event            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Increase in number of shares reserved for issuance (in shares) 32,070          
2016 Plan | Stock options            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award expiration period       10 years    
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    
2016 Plan | Stock options | Minimum | Director            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period       1 year    
Employee Stock Purchase Plan (ESPP)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock remaining for future issuance (in shares)       784    
Total stock-based compensation       $ 200 $ 200  
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        
Shares of common stock for future issuance (in shares)   174       174
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) 174