Discontinued Operations - Results of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Inventory impairments and lot option abandonments	$ 1,007	$ 0
Loss from discontinued operations, net of tax	(11)	(372)
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenue	55	625
Home construction and land sales expenses	33	667
Inventory impairments and lot option abandonments	0	450
Gross profit (loss)	22	(492)
General and administrative expenses	33	16
Operating loss	(11)	(508)
Equity in (loss) income of unconsolidated entities	(1)	12
Other expense, net	(1)	(3)
Loss from discontinued operations before income taxes	(13)	(499)
Benefit from income taxes	(2)	(127)
Loss from discontinued operations, net of tax	$ (11)	$ (372)