Note 3 - Segment Reporting (Details Textual) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
Number of Operating Segments			2
Number of Reportable Segments			4
Homebuilding [Member] | North [Member]
Depreciation, Depletion and Amortization, Nonproduction	$ 2.2	$ 1.5	$ 3.6	$ 2.7
Homebuilding [Member] | Southeast [Member]
Depreciation, Depletion and Amortization, Nonproduction	4.2	4.2	7.7	7.0
Homebuilding [Member] | Southwest [Member]
Depreciation, Depletion and Amortization, Nonproduction	3.0	3.2	5.5	5.9
Homebuilding [Member] | West [Member]
Depreciation, Depletion and Amortization, Nonproduction	$ 5.5	$ 6.5	$ 10.8	$ 11.8