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Investment in Affiliate - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Investments In And Advances To Affiliates [Line Items]      
Duration of prison management contract with an agency of the United Kingdom government 25 years    
Working capital loan to APM $ 2,886,000 $ 2,741,000  
Equity earnings (losses) of joint venture $ 325,000 $ (124,000) $ (138,000)
Agecroft Prison Management Ltd      
Investments In And Advances To Affiliates [Line Items]      
Variable interest entity, ownership percentage 50.00%