Share-Based Payment Plans - Incentive Plan (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 31, 2021	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2018
Non executive directors
Plan disclosures
Shares issued		2,912	3,073	9,457	8,894
Value of shares available for issuance for compensation related to annual fees	$ 50,000					$ 10,000
2017 Plan
Plan disclosures
Shares issued		0	0	84,335	64,962