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Fair Value Measurements (Tables)
 3 Months Ended
Dec. 31, 2019
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
 
December 31, 2019
 
 
 
Total Fair Value
 
 
Quoted Prices (Level 1)
 
 
Significant Unobservable Inputs (Level 3)
Executive savings plan assets
 
$
812

 
$
812

 
$
—

Executive savings plan liabilities
 
 
(693
)
 
 
(693
)
 
 
—

Contingent consideration
 
 
(11
)
 
 
—

 
 
(11
)
Total
 
$
108

 
$
119

 
$
(11
)

 
September 30, 2019
 
 
 
Total Fair Value
 
 
Quoted Prices (Level 1)
 
 
Significant Unobservable Inputs (Level 3)
Executive savings plan assets
 
$
763

 
$
763

 
$
—

Executive savings plan liabilities
 
 
(646
)
 
 
(646
)
 
 
—

Contingent consideration
 
 
(11
)
 
 
—

 
 
(11
)
Total
 
$
106

 
$
117

 
$
(11
)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

 
 
 
Contingent Consideration Agreements
Fair value at September 30, 2019
 
$
11

Settlements
 
 
—

Net adjustments to fair value
 
 
—

Fair value at December 31, 2019
 
$
11