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Acquisitions PayCommerce Financial Solutions Acquisition (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 | Sep. 30, 2018
PayCommerce [Member] [Member] |  |
Business Acquisition [Line Items] |  |
Business Combination, Consideration Transferred |  | $ 3.8
Business Combination, Acquired Receivable, Fair Value |  | 0.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment |  | 0.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets |  | 0.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  | 2.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  | $ 1.3
Finite-Lived Intangible Asset, Useful Life |  | 5 years
Goodwill, Acquired During Period |  | $ 2.6
Akshay Financeware, Inc. Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Business Combination, Consideration Transferred | $ 0.2 |

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