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Debt (Details)
 1 Months Ended 3 Months Ended 9 Months Ended
Dec. 31, 2023
USD ($)
Nov. 30, 2023
USD ($)
installment
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Debt Instrument [Line Items]            
Interest expense, net     $ 868,000 $ 936,000 $ 2,690,000 $ 2,801,000
Restricted cash, non-current $ 4,128,000   4,682,000 0 4,682,000 0
AFCO Premium Credit LLC Insurance Premium Financing Agreement | Notes Payable, Other Payables            
Debt Instrument [Line Items]            
Interest rate, stated percentage (in percent)   7.00%        
Debt instrument, face amount   $ 1,200,000        
Debt instrument, term (in months)   12 months        
Down payment   $ 300,000        
Long-term debt   $ 900,000        
Periodic payment, number of quarterly installments | installment   3        
Revolving Credit Facility | City National Bank Revolving Credit Agreement | Line of Credit            
Debt Instrument [Line Items]            
Maximum borrowing capacity $ 20,000,000 $ 30,000,000        
Unused line fee (in percent) 0.30%          
Commitment fee, payable term after each quarter 10 days          
Commitment fee (in percent) 0.50%          
Deferred offering costs capitalized     32,000   32,000  
Commitment fee         100,000  
Unamortized debt issuance cost     $ 100,000   $ 100,000  
Interest rate, stated percentage (in percent)     8.10%   8.10%  
Interest expense, net     $ 100,000 $ 200,000 $ 400,000 $ 500,000
Outstanding balance     4,700,000   4,700,000  
Outstanding amount available to be borrowed     $ 15,300,000   $ 15,300,000  
Revolving Credit Facility | City National Bank Revolving Credit Agreement | Line of Credit | Secured Overnight Financing Rate (SOFR)            
Debt Instrument [Line Items]            
Basis spread on variable rate (in percent) 2.75%          
Revolving Credit Facility | City National Bank Revolving Credit Agreement | Line of Credit | Base Rate            
Debt Instrument [Line Items]            
Basis spread on variable rate (in percent) 3.00%