v3.26.1
Debt Obligations - Narrative (Details)
$ in Thousands
1 Months Ended 6 Months Ended
Jan. 27, 2021
USD ($)
promissory_note
Dec. 31, 2024
USD ($)
Jun. 30, 2026
USD ($)
Jan. 31, 2027
USD ($)
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Feb. 01, 2023
USD ($)
Debt Instrument [Line Items]              
Unamortized discount     $ 23     $ 24  
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 | 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]              
Contractual period   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     $ 2,500    
Revolving Credit Facility | Secured Debt | Forecast              
Debt Instrument [Line Items]              
Minimum cash balance requirement       $ 5,000      
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 | SOFR              
Debt Instrument [Line Items]              
Basis spread on variable rate   4.50%          
Floor   2.50%