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Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Accrued expenses and other current liabilities:
Accrued wages, bonuses, commissions and vacation	$ 6,808	$ 6,649
Accrued interest	713	271
Accrued contingent consideration — current portion	26,703	25,768
Escrow liabilities	14,851	9,067
Customer deposits	1,842	1,913
Employee health self-insurance liability	648	1,032
Other current liabilities	42,130	6,115
Accrued expenses and other current liabilities	93,695	$ 50,815
Acquisition related liabilities, current	$ 35,000

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