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Acquisitions and Joint Ventures - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 04, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Jun. 30, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020 | Jul. 31, 2020
Business Acquisition Contingent Consideration [Line Items] |  |  |  |  |  |  |  |
Contingent consideration | $ 10,300 |  |  |  |  |  |  |
Fair value | $ 600 |  |  |  |  |  |  |
Increase in estimated fair value of earnout |  |  |  |  |  |  | $ 1,700 |
Earnout Payments |  |  |  | $ 600 |  | $ 800 |  |
Earn Out Liability |  | $ 800 |  |  | $ 800 |  |  |
EIS revenue |  | 5,700 | $ 5,300 |  | 13,900 | 5,800 |  |
Net revenue |  | 700 | 400 |  | 1,600 | 600 |  |
Assets Current |  | 189,708 |  |  | 189,708 |  | 183,485 |
Liabilities |  | 216,149 |  |  | 216,149 |  | $ 215,703 |
Pre tax loss |  | (1,133) | (44) |  | 1,296 | 7,969 |  |
Joint Venture Agreement [Member] | Mader Holdings L.P. [Member] |  |  |  |  |  |  |  |
Business Acquisition Contingent Consideration [Line Items] |  |  |  |  |  |  |  |
Percentage of equity hold in joint venture |  |  |  |  |  |  |  | 70.00%
Voting interest in joint venture |  |  |  |  |  |  |  | 50.00%
Non controlling equity interest |  |  |  |  |  |  |  | 30.00%
Net assets acquired |  |  |  |  |  |  |  | $ 1,000
Assets Current |  | 8,000 |  |  | 8,000 |  |  |
Noncurrent Assets |  | 8,700 |  |  | 8,700 |  |  |
Liabilities |  | 8,000 |  |  | 8,000 |  |  |
Revenues |  | 4,900 | 3,500 |  | 14,500 | 10,500 |  |
Pre tax loss |  | 300 | $ 100 |  | 1,500 | $ 1,200 |  |
Customer Lists [Member] |  |  |  |  |  |  |  |
Business Acquisition Contingent Consideration [Line Items] |  |  |  |  |  |  |  |
Acquired intangible assets |  | 4,200 |  |  | 4,200 |  |  |
Tradename [Member] |  |  |  |  |  |  |  |
Business Acquisition Contingent Consideration [Line Items] |  |  |  |  |  |  |  |
Acquired intangible assets |  | $ 600 |  |  | $ 600 |  |  |
Customer Lists and Tradename [Member] |  |  |  |  |  |  |  |
Business Acquisition Contingent Consideration [Line Items] |  |  |  |  |  |  |  |
Intangible assets, Useful Life |  |  |  |  | 10 years |  |  |
Environmental Integrated Solutions [Member] |  |  |  |  |  |  |  |
Business Acquisition Contingent Consideration [Line Items] |  |  |  |  |  |  |  |
Acquisition of equity | 100.00% |  |  |  |  |  |  |
Net assets acquired | $ 10,914 |  |  |  |  |  |  |

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