Discontinued Operations - Results of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations, net of tax	$ (7)	$ (82)	$ (161)	$ (141)
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Home construction and land sales expenses	0	62	119	47
Gross loss	0	(62)	(119)	(47)
General and administrative expenses	10	43	88	133
Operating loss	(10)	(105)	(207)	(180)
Other expense, net	0	0	0	(1)
Loss from discontinued operations before income taxes	(10)	(105)	(207)	(181)
Benefit from income taxes	(3)	(23)	(46)	(40)
Loss from discontinued operations, net of tax	$ (7)	$ (82)	$ (161)	$ (141)