Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Inventory Write-down	$ 0	$ 0	$ 147,611	$ 1,007	$ 6,331	$ 168	$ 0	$ 0	$ 148,618	$ 6,499	$ 2,445
Loss from discontinued operations, net of tax									(99)	(329)	(140)
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenue									55	633	0
Home construction and land sales expenses									61	612	72
Inventory Write-down									0	450	0
Gross loss									(6)	(429)	(72)
General and administrative expenses									125	101	169
Operating loss									(131)	(530)	(241)
Equity in (loss) income of unconsolidated entities									(1)	93	31
Other income (expense), net									5	(4)	(5)
Loss from discontinued operations before income taxes									(127)	(441)	(215)
Benefit from income taxes									(28)	(112)	(75)
Loss from discontinued operations, net of tax									$ (99)	$ (329)	$ (140)