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Debt Obligations - Narrative (Details)
$ in Thousands
1 Months Ended 6 Months Ended
Dec. 27, 2024
USD ($)
Jan. 27, 2021
USD ($)
promissory_note
Dec. 31, 2024
USD ($)
Jun. 30, 2025
USD ($)
Dec. 01, 2025
USD ($)
Feb. 01, 2023
USD ($)
Debt Instrument [Line Items]            
Unamortized discount     $ 24 $ 23    
CFG Loan            
Debt Instrument [Line Items]            
Number of instruments (in instruments) | promissory_note   2        
Secured Debt | Arq Limited            
Debt Instrument [Line Items]            
Periodic payment, principal   $ 100        
Indebtedness to net worth ratio       4    
Debt instrument, annual increase       20.00%    
Equity percentage       1.25    
Secured Debt | Arq Limited | CTB Loan            
Debt Instrument [Line Items]            
Face amount           $ 10,000
Estimated fair value           9,700
Unamortized discount           $ 300
Secured Debt | Arq Limited | Promissory Note A            
Debt Instrument [Line Items]            
Face amount   8,000        
Secured Debt | Arq Limited | Promissory Note B            
Debt Instrument [Line Items]            
Face amount   $ 2,000        
Secured Debt | Through January 2026 | Arq Limited            
Debt Instrument [Line Items]            
Interest rate, stated percentage   6.00%        
Secured Debt | Penalty Year 2024 | Arq Limited            
Debt Instrument [Line Items]            
Prepayment penalty, percentage       3.00%    
Secured Debt | Penalty Year 2025 | Arq Limited            
Debt Instrument [Line Items]            
Prepayment penalty, percentage       2.00%    
Secured Debt | Penalty Year 2026 | Arq Limited            
Debt Instrument [Line Items]            
Prepayment penalty, percentage       1.00%    
Secured Debt | Prime Rate | After January 2026 | Arq Limited | CTB Loan            
Debt Instrument [Line Items]            
Interest rate, stated percentage   2.75%        
Revolving Credit Facility | Secured Debt            
Debt Instrument [Line Items]            
Term 5 years   5 years      
Line of credit facility, maximum borrowing capacity $ 30,000          
Line of credit facility, commitment fee percentage 0.50%          
Line of credit facility, management fee percentage 0.25%          
Minimum cash balance requirement $ 5,000          
Loan due       $ 18,500    
Revolving Credit Facility | Secured Debt | Tranche Year One            
Debt Instrument [Line Items]            
Line of credit facility, preclosure fee percentage 2.00%          
Revolving Credit Facility | Secured Debt | Tranche Year Two            
Debt Instrument [Line Items]            
Line of credit facility, preclosure fee percentage 1.00%          
Revolving Credit Facility | Secured Debt | Tranche Year Three            
Debt Instrument [Line Items]            
Line of credit facility, preclosure fee percentage 0.50%          
Revolving Credit Facility | Secured Debt | Tranche Year Thereafter            
Debt Instrument [Line Items]            
Line of credit facility, preclosure fee percentage 0.00%          
Revolving Credit Facility | Secured Debt | December 1st, 2025 | Forecast            
Debt Instrument [Line Items]            
Minimum cash balance requirement         $ 5,000  
Revolving Credit Facility | Secured Debt | SOFR            
Debt Instrument [Line Items]            
Basis spread on variable rate 4.50%          
Floor 2.50%