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SUPPLEMENTAL BALANCE SHEET INFORMATION - Accrued expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Sep. 30, 2021
Accrued expenses    
Accrued compensation $ 11,030 $ 3,528
Non-income taxes 1,888 18
Accrued interest 2,339 169
Current portion of long-term finance lease 22 24
Other 8,072 4,887
Current portion of contingent liability 167 167
Consideration payable   175
Accrued expenses and other liabilities $ 23,518 $ 8,968