Segment Disclosures - Segment Reporting Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Gross revenue	$ 8,799	$ 10,268
Gross profit (loss)	586	943
Net (loss) income	(628)	(664)
Depreciation and amortization	37	74
Interest expense	85	0
Total assets	53,298	56,396	$ 51,158
Homebuilding [Member]
Segment Reporting Information [Line Items]
Gross revenue	5,561	10,064
Gross profit (loss)	66	963
Net (loss) income	(681)	(644)
Depreciation and amortization	0	65
Interest expense	61	0
Total assets	46,409	56,317
Asset Management [Member]
Segment Reporting Information [Line Items]
Gross revenue	2,791	0
Gross profit (loss)	250	0
Net (loss) income	250	0
Depreciation and amortization	0	0
Interest expense	0	0
Total assets	3,976	0
Real Estate Services [Member]
Segment Reporting Information [Line Items]
Gross revenue	447	204
Gross profit (loss)	270	(20)
Net (loss) income	(197)	(20)
Depreciation and amortization	37	9
Interest expense	24	0
Total assets	$ 2,913	$ 79