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Equity Incentive and Other Plans - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
2021 Plan              
Number of Shares              
Outstanding (in shares)         4,976 4,976 4,976
Forfeited or expired (in shares)         (4,952)    
Outstanding (in shares) 24 4,976 4,976 4,976 24 4,976 4,976
Vested and exercisable (in shares) 17       17    
Weighted Average Exercise Price              
Outstanding (in usd per share)         $ 39.6 $ 39.6 $ 39.6
Forfeited or expired (in usd per share)         39.6    
Outstanding (in usd per share) $ 39.6 $ 39.6 $ 39.6 $ 39.6 39.6 $ 39.6 $ 39.6
Vested and exercisable (in usd per share) $ 39.6       $ 39.6    
Aggregate Intrinsic Value              
Outstanding $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Vested and exercisable $ 0       $ 0    
Weighted Average Remaining Contractual Term (in years)              
Outstanding 7 years 10 months 17 days 8 years 1 month 20 days 8 years 4 months 20 days 8 years 7 months 20 days      
Vested and exercisable 7 years 10 months 17 days            
2018 Plan              
Number of Shares              
Outstanding (in shares)         114,981 116,250 116,451
Forfeited or expired (in shares)         (19) (1,269) (201)
Outstanding (in shares) 114,962 114,981 116,250 116,451 114,962 114,981 116,250
Vested and exercisable (in shares) 72,488       72,488    
Weighted Average Exercise Price              
Outstanding (in usd per share)         $ 33.96 $ 34.06 $ 34.24
Forfeited or expired (in usd per share)         22 36.94 135.21
Outstanding (in usd per share) $ 33.96 $ 33.96 $ 34.06 $ 34.24 33.96 $ 33.96 $ 34.06
Vested and exercisable (in usd per share) $ 28.61       $ 28.61    
Aggregate Intrinsic Value              
Outstanding $ 0 $ 0 $ 0 $ 3 $ 0 $ 0 $ 0
Vested and exercisable $ 0       $ 0    
Weighted Average Remaining Contractual Term (in years)              
Outstanding 3 years 10 months 17 days 4 years 1 month 17 days 4 years 4 months 6 days 4 years 7 months 24 days      
Vested and exercisable 5 years 2 months 12 days