Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations, net of tax	$ (159)	$ (1,090)	$ (99)
Litigation settlement accrual		1,300
Litigation settlement expense	1,400
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenue	0	0	55
Home construction and land sales expenses	119	1,245	61
Gross loss	(119)	(1,245)	(6)
General and administrative expenses	85	173	125
Operating loss	(204)	(1,418)	(131)
Equity in loss of unconsolidated entities	0	0	(1)
Other income, net	0	19	5
Loss from discontinued operations before income taxes	(204)	(1,399)	(127)
Benefit from income taxes	(45)	(309)	(28)
Loss from discontinued operations, net of tax	$ (159)	$ (1,090)	$ (99)