Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Details)

v3.23.3
Stock-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Nov. 11, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock-based compensation $ 595 $ 1,062  
Stock-Based Compensation Expense 47    
Unrecognized compensation expense related to unvested options and time-based RSUs, expected to vest $ 116    
Unrecognized compensation expense related to unvested options, weighted average period 2 years 1 month 6 days    
Aggregate intrinsic value of vested options $ 0    
Aggregate intrinsic value of unvested options $ 0    
Stock Options      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock options exercisable period 10 years    
Stock options vest period 4 years    
Weighted average grant-date fair value of the options awarded to employees $ 0.24    
Time-based RSUs Granted Outside Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Time-based RSU, granted 2    
Stock Options And Time-based RSUs      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Unrecognized compensation expense related to unvested options and time-based RSUs, expected to vest $ 240    
Time Based Restricted Stock      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Unrecognized compensation expense related to unvested options, weighted average period 7 months 6 days    
Outside Two Thousand Nineteen Plan Stock Options Member      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Granted 28    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross 28    
2019 Equity Incentive Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Shares available for grant 31,581   2,142
Percentage of outstanding common stock 5.00%    
Shares available for future grants 19,220    
TeraImmune 2019 Equity Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Shares available for future grants 0