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Fair Value Measurements (Tables)
12 Months Ended
Sep. 30, 2022
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
September 30, 2022
Total Fair ValueQuoted Prices (Level 1)Significant Unobservable (Level 3)
Executive savings plan assets$706 $706 $— 
Equity securities1,937 1,937 — 
Executive savings plan liabilities(585)(585)— 
Contingent consideration liability(4,323)— (4,323)
September 30, 2021
Total Fair ValueQuoted Prices (Level 1)Significant Unobservable (Level 3)
Executive savings plan assets$937 $937 $— 
Executive savings plan liabilities(806)(806)— 
Contingent consideration liability(4,181)— (4,181)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Contingent Consideration Agreement
Fair Value at September 30, 2020$— 
Acquisitions(4,074)
Net adjustments to fair value(107)
Fair Value at September 30, 2021$(4,181)
Net adjustments to fair value(142)
Fair Value at September 30, 2022$(4,323)