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Equity (Employee Stock Purchase Plan) (Details) - Employee stock purchase plan
9 Months Ended
Jun. 30, 2020
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
ESPP offering period (months) 6 months
Purchase price (as percentage of market price) 85.00%
Annual contribution (as percentage of compensation) 10.00%
Annual contribution $ 25,000