Discontinued Operations - Results of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations, net of tax	$ (115)	$ (1)	$ (154)	$ (59)
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenue	0	0	0	0
Home construction and land sales expenses	121	(16)	119	(15)
Gross (loss) profit	(121)	16	(119)	15
General and administrative expenses	26	16	78	90
Operating loss	(147)	0	(197)	(75)
Other expense, net	0	(1)	0	(1)
Loss from discontinued operations before income taxes	(147)	(1)	(197)	(76)
Benefit from income taxes	(32)	0	(43)	(17)
Loss from discontinued operations, net of tax	$ (115)	$ (1)	$ (154)	$ (59)