Discontinued Operations - Results of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of tax	$ 9	$ (325)	$ (101)	$ (447)
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 (credits)	(12)	395	72	647
Gross profit (loss)	12	(395)	(72)	(647)
General and administrative expenses	21	111	112	58
Operating income (loss)	(9)	(506)	(184)	(705)
Disposal Group, Including Discontinued Operations, Income (Loss) From Equity Method Investments	20	0	20	0
Other expense, net	(4)	0	(7)	0
Income (loss) from discontinued operations before income taxes	7	(506)	(171)	(705)
Benefit from income taxes	(2)	(181)	(70)	(258)
Income (loss) from discontinued operations, net of tax	$ 9	$ (325)	$ (101)	$ (447)