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Subsequent Events - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Oct. 06, 2020
Sep. 30, 2020
Apr. 13, 2020
Apr. 30, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Subsequent Event [Line Items]                        
Period between issuance and expiration of outstanding warrant         10 years              
Proceeds from the Series A-2 and Warrant         $ 175,000              
Percentage of dividends accrued         14.20%              
Exercise of warrant options, Shares             2,534,239   2,534,239      
Exercise of warrant options, Average Price per Share             $ 0.01   $ 0.01      
Number of common stock shares issued in connection with business acquisition               25,408 791,139 150,439 150,439 264,582
Line of credit         $ 225,000              
Line of credit facility maturity date         Apr. 30, 2025              
Debt instrument, repayments       $ 500                
Forecast                        
Subsequent Event [Line Items]                        
Debt instrument, repayments $ 1,600 $ 1,100   $ 500                
CTEH                        
Subsequent Event [Line Items]                        
Percentage of interests acquired           100.00%            
Convertible And Redeemable Series A-2 Preferred Stock                        
Subsequent Event [Line Items]                        
Temporary equity, shares issued       17,500 17,500   17,500   17,500   0  
Temporary equity, par value per share       $ 0.0001 $ 0.0001   $ 0.0001   $ 0.0001   $ 0.0001  
Percentage of dividends accrued         15.00%              
Temporary equity description                 The Company may, at its option on any one or more dates, redeem all or a minimum portion (the lesser of (i) $25.0 million in aggregate stated value of the Convertible and Redeemable Series A-2 Preferred Stock and (ii) all of the Convertible and Redeemable Series A-2 Preferred Stock then outstanding) of the outstanding Convertible and Redeemable Series A-2 Preferred Stock in cash. In the event the Company redeemed all or a portion of the Convertible and Redeemable Series A-2Preferred Stock prior to the three year anniversary of the issuance date, such redemption amount shall include principal, accrued but unpaid interest and a make whole payment such that the aggregate amount reflects three years of dividends.      
Percentage of discount on common stock market price                 15.00%      
Percentage of dividend rate steps downs per year                 9.00%      
Number of times increase in debt incurrence test ratio                 4.5      
Convertible And Redeemable Series A-2 Preferred Stock | CTEH                        
Subsequent Event [Line Items]                        
Number of common stock shares issued in connection with business acquisition                   791,139    
Convertible And Redeemable Series A-2 Preferred Stock | 60-Day Period Prior to Seventh Anniversary                        
Subsequent Event [Line Items]                        
Temporary equity convertible into common stock       $ 60,000     $ 60,000   $ 60,000      
Convertible And Redeemable Series A-2 Preferred Stock | Year 5                        
Subsequent Event [Line Items]                        
Temporary equity convertible into common stock       60,000     60,000   60,000      
Convertible And Redeemable Series A-2 Preferred Stock | Year 6                        
Subsequent Event [Line Items]                        
Temporary equity convertible into common stock       120,000     120,000   120,000      
Previously Reported | Forecast                        
Subsequent Event [Line Items]                        
Debt instrument, repayments   $ 1,200                    
Term Loan Facility                        
Subsequent Event [Line Items]                        
Line of credit       $ 174,453 $ 175,000   $ 174,453   $ 174,453   $ 48,750 $ 50,000
Term Loan Facility | LIBOR Plus                        
Subsequent Event [Line Items]                        
Interest rate         5.00%       5.00%      
Term Loan Facility | LIBOR Floor                        
Subsequent Event [Line Items]                        
Interest rate         4.50%       1.00%      
Revolving Line of Credit                        
Subsequent Event [Line Items]                        
Line of credit         $ 50,000           $ 97,590 $ 20,000
Line of credit facility maturity date                     Oct. 19, 2021  
Revolving Line of Credit | LIBOR Plus                        
Subsequent Event [Line Items]                        
Interest rate                 3.50%      
Subsequent Event                        
Subsequent Event [Line Items]                        
Percentage of dividends accrued         14.20%              
Line of credit         $ 225,000              
Line of credit facility maturity date         Apr. 30, 2025              
Subsequent Event | CTEH                        
Subsequent Event [Line Items]                        
Percentage of interests acquired           100.00%            
Subsequent Event | Convertible And Redeemable Series A-2 Preferred Stock                        
Subsequent Event [Line Items]                        
Temporary equity, shares issued         17,500              
Temporary equity, par value per share         $ 0.0001              
Exercise of warrant options, Shares         $ 30,000              
Period between issuance and expiration of outstanding warrant         10 years              
Proceeds from the Series A-2 and Warrant         $ 175,000              
Percentage of dividends accrued         15.00%              
Temporary equity, covenant description         The Series A-2Preferred Stock contains restrictive covenants that include (i) maximum 4.0 times debt incurrence test and (ii) 10.0 times total leverage cap (inclusive of the outstanding balance on the Series A-2 Preferred Stock).              
Temporary equity description         The Company may, at its option on any one or more dates, redeem all or a minimum portion (the lesser of (i) $50.0 million in aggregate stated value of the Series A-2 Preferred Stock and (ii) all of the Series A-2 Preferred Stock then outstanding) of the outstanding Series A-2 Preferred Stock in cash.              
Percentage of discount on common stock market price         15.00%              
Percentage of dividend rate steps downs per year         9.00%              
Number of times increase in debt incurrence test ratio         4.5              
Exercise of warrant options, Shares         1,351,960              
Exercise of warrant options, Average Price per Share         $ 0.01              
Warrant options, exrecisable         949,367              
Warrant options, exrecisable period         10 years              
Subsequent Event | Convertible And Redeemable Series A-2 Preferred Stock | CTEH                        
Subsequent Event [Line Items]                        
Number of common stock shares issued in connection with business acquisition           791,139            
Common stock shares issued in connection with business acquisition, price per share           $ 31.60            
Subsequent Event | Convertible And Redeemable Series A-2 Preferred Stock | 60-Day Period Prior to Seventh Anniversary                        
Subsequent Event [Line Items]                        
Temporary equity convertible into common stock         $ 60,000              
Subsequent Event | Convertible And Redeemable Series A-2 Preferred Stock | Year 5                        
Subsequent Event [Line Items]                        
Temporary equity convertible into common stock         60,000              
Subsequent Event | Convertible And Redeemable Series A-2 Preferred Stock | Year 6                        
Subsequent Event [Line Items]                        
Temporary equity convertible into common stock         120,000              
Subsequent Event | Term Loan Facility                        
Subsequent Event [Line Items]                        
Line of credit         $ 175,000              
Subsequent Event | Term Loan Facility | LIBOR Plus                        
Subsequent Event [Line Items]                        
Interest rate     1.00%   5.00%              
Subsequent Event | Term Loan Facility | LIBOR Floor                        
Subsequent Event [Line Items]                        
Interest rate     1.00%   1.00%              
Subsequent Event | Revolving Line of Credit                        
Subsequent Event [Line Items]                        
Line of credit         $ 50,000              
Subsequent Event | Revolving Line of Credit | LIBOR Plus                        
Subsequent Event [Line Items]                        
Interest rate         3.50%