Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Summary of Stock Options Activity (Details)

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Stock-Based Compensation - Summary of Stock Options Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Number of Shares    
Outstanding, beginning balance (in shares) 24,435  
Granted (in shares) 0  
Exercised (in shares) 0  
Cancelled (in shares) (11,687)  
Outstanding, ending balance (in shares) 12,748 24,435
Number of shares, Exercisable (in shares) 7,059  
Number of shares, Vested or expected to vest (in shares) 12,748  
Weighted Average Exercise Price    
Outstanding beginning balance (in dollars per share) $ 0.32  
Granted (in dollars per share) 0  
Exercised (in dollars per share) 0  
Cancelled (in dollars per share) 0.42  
Outstanding ending balance (in dollars per share) 0.24 $ 0.32
Weighted average exercise price, Exercisable (in dollars per share) 0.39  
Weighted average exercise price, Vested or expected to vest (in dollars per share) $ 0.24  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]    
Outstanding balance, weighted average remaining contract term (in years) 7 years 10 months 24 days 4 years 4 months 24 days
Options exercisable, weighted average remaining contract term (in years) 7 years 1 month 6 days  
Options Vested or expected to vest, weighted average remaining contract term (in years) 7 years 10 months 24 days  
Outstanding, aggregate intrinsic value $ 6 $ 6
Options exercisable, aggregate intrinsic value 3  
Options Vested or expected to vest, aggregate intrinsic value $ 6