Nature of Business and Significant Accounting Policies (Narrative) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($)	Sep. 30, 2023 USD ($) item country segment	Sep. 30, 2022 USD ($)
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Number of countries in which entity operates | country		150
Number of primary financial institutions where cash is maintained | item		3
Number of reporting units | item		2
Number of operating segments | segment		1
Impairment charge		$ 3,900,000
Capitalized nonrefundable advance payments		0
Research and development		51,138,480	$ 70,646,103
Advertising costs		900,000	600,000
Assets		50,595,925	136,126,017
Foreign currency gains (losses)		0	0
Accumulated Foreign Currency Translation Loss [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Accumulated other comprehensive income (loss)		(600,000)	(600,000)
Outside United States [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Assets		10,500,000	$ 10,800,000
Acquired In-Process Research and Development [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Impairment charge	$ 3,900,000
Intangible assets, net		$ 0