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Fair Value Measurements (Tables)
12 Months Ended
Sep. 30, 2021
Fair Value Disclosures [Abstract]  
Schedule of Changes in Level 3 Financial Instruments Measured on a Recurring Basis The following tables present the changes in the Company's Level 3 financial instruments that are measured at fair value on a recurring basis.
Accrued Contingent Consideration
Balance at September 30, 2019$18,226 
Contingent consideration accrued at time of business combination4,748 
Change in fair value of contingent consideration included in Operating expenses(1,409)
Contingent consideration paid(8,531)
Balance at September 30, 2020$13,034 
Contingent consideration accrued at time of business combination22,577 
Change in fair value of contingent consideration included in Operating expenses7,140 
Contingent consideration paid(6,522)
Balance at September 30, 2021$36,229