Acquisitions - PayCommerce Financial Solutions Acquisition (Details) - USD ($)			12 Months Ended
	Feb. 13, 2019	Sep. 05, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Business Acquisition [Line Items]
Goodwill purchase accounting adjustments			$ 100,000	$ 0
PayCommerce [Member]
Business Acquisition [Line Items]
Total merger consideration		$ 3,800,000
Income tax receivable		700,000
Property and equipment, net		800,000
Total fair value of tangible liabilities assumed		2,200,000
Identifiable intangible assets acquired		$ 1,300,000
Finite-lived intangible asset, useful life		5 years
Remaining excess allocated to goodwill					$ 2,600,000
Akshay Financeware, Inc. Acquisition [Member]
Business Acquisition [Line Items]
Total merger consideration	$ 200,000
Equity investment related to a minority interest in the joint venture entity		$ 500,000
Remaining excess allocated to goodwill				$ 1,300,000
Purchase of shareholders equity interest	500,000
Indefinite-lived intangible assets acquired	2,700,000
Deferred tax liabilities	700,000
Goodwill purchase accounting adjustments	$ 1,300,000