Annual report [Section 13 and 15(d), not S-K Item 405]

Long-Term Debt - Additional Information (Detail)

v3.25.1
Long-Term Debt - Additional Information (Detail)
$ in Thousands
12 Months Ended
Feb. 16, 2024
USD ($)
Days
Feb. 02, 2023
USD ($)
Jun. 24, 2022
USD ($)
Feb. 02, 2021
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Debt Instrument [Line Items]            
Interest expense         $ 17,173 $ 15,745
Accretion expense         4,624 3,950
Secured debt long term fair value         170,148 151,605
Debt instrument, loss on extinguishment of debt         (114) (1,288)
Debt issuance costs, net         21,900 20,400
Debt instrument, unamortized discount costs         11,400 14,600
June Secured Debentures [Member]            
Debt Instrument [Line Items]            
Debt instrument face value     $ 99,700      
Debt instrument maturity date     Jun. 24, 2027      
Interest expense         9,400 8,700
Accretion expense         3,000 2,900
Secured debt long term fair value     $ 84,500   134,096 118,118
June Unsecured Debentures [Member]            
Debt Instrument [Line Items]            
Debt instrument face value     $ 20,000      
Debt instrument maturity date     Jun. 24, 2027      
Interest expense         1,900 1,700
Accretion expense         1,000 900
Secured debt long term fair value     $ 14,900      
Additional Secured Debentures [Member]            
Debt Instrument [Line Items]            
Interest expense         $ 2,400 2,200
Secured debt long term fair value     $ 25,000      
Minimum [Member] | June Secured Debentures [Member]            
Debt Instrument [Line Items]            
Debt instrument interest rate stated percentage     8.00%      
Minimum [Member] | June Unsecured Debentures [Member]            
Debt Instrument [Line Items]            
Debt instrument interest rate stated percentage     8.00%      
Maximum [Member] | June Secured Debentures [Member]            
Debt Instrument [Line Items]            
Debt instrument interest percentage on event of default     11.00%      
Maximum [Member] | June Unsecured Debentures [Member]            
Debt Instrument [Line Items]            
Debt instrument interest percentage on event of default     11.00%      
I Anthus New Jersey LLC [Member]            
Debt Instrument [Line Items]            
Description about qualified financing         Qualified Financing” means a transaction or series of related transactions resulting in net proceeds to the ICH of not less than $10 million from the subscription of the ICH's securities, including, but not limited to, a private placement or rights offering.  
Secured Debenture Purchase Agreement [Member] | Additional Secured Debentures [Member]            
Debt Instrument [Line Items]            
Debt instrument face value     $ 25,000      
Debt instrument maturity date     Jun. 24, 2027      
Secured Debenture Purchase Agreement [Member] | Minimum [Member] | Additional Secured Debentures [Member]            
Debt Instrument [Line Items]            
Debt instrument interest rate stated percentage     8.00%      
Secured Debenture Purchase Agreement [Member] | Maximum [Member] | Additional Secured Debentures [Member]            
Debt Instrument [Line Items]            
Debt instrument interest percentage on event of default     11.00%      
Long Term Debt [Member]            
Debt Instrument [Line Items]            
Interest accrued on current and long term debt         $ 1,500 100
New Jersey Senior Secured Bridge Notes [Member]            
Debt Instrument [Line Items]            
Percentage of outstanding shares Held     5.00%      
New Jersey Senior Secured Bridge Notes [Member] | I Anthus New Jersey LLC [Member]            
Debt Instrument [Line Items]            
Debt instrument face value   $ 1,400   $ 11,000    
Debt instrument maturity date   Feb. 02, 2024   Feb. 02, 2023    
Interest rate on secured notes       14.00%    
Interest expense         1,900 1,700
Accretion expense         600 100
Secured debt long term fair value $ 14,300          
Threshold limit of qualified financing, net proceeds not less than the subscription of securities         10,000  
Percentage of total outstanding debt instrument principal amount   10.00%        
Debt instrument interest rate stated percentage   12.00%        
New Jersey Senior Secured Bridge Notes [Member] | I Anthus New Jersey LLC [Member] | 2024 New Jersey Amendment [Member]            
Debt Instrument [Line Items]            
Debt instrument face value $ 1,600          
Non Operational Cash Receipts, Utilization Rate 25.00%          
Payment towards Principal Amount Outstanding $ 5,000          
Debt Instrument, Maturity Date Range, Start Feb. 16, 2024          
Debt Instrument Extended Maturity Date Feb. 16, 2026          
Percentage of total outstanding debt instrument principal amount 10.00%          
Debt instrument interest rate stated percentage 12.00%          
Debt Instrument, Convertible, Threshold Trading Days | Days 20          
Debt Instrument, Date of First Required Payment May 16, 2024          
Debt instrument, loss on extinguishment of debt         $ 100 $ 1,300
New Jersey Senior Secured Bridge Notes [Member] | Prospective Recapitalization Transaction [Member] | I Anthus New Jersey LLC [Member]            
Debt Instrument [Line Items]            
Interest rate on secured notes       8.00%    
New Jersey Senior Secured Bridge Notes [Member] | Prospective Default [Member] | I Anthus New Jersey LLC [Member]            
Debt Instrument [Line Items]            
Interest rate on secured notes       25.00%