Note 6 - Fair Value Measurements - Quantitative Data Regarding Unobservable Inputs and Sensitivity Analysis (Details)	3 Months Ended				9 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2016
Minimum [Member]
Number of homes closed per year					0
Average sales price					400,000
Discount rate	15.00%	12.00%	12.00%		5.00%
Maximum [Member]
Number of homes closed per year					127
Average sales price					1.3
Discount rate	18.00%	15.00%	15.00%		12.00%
Weighted Average [Member]
Number of homes closed per year					102
Average sales price					527,000
Discount rate					9.00%
Number of homes closed per year					Increase
Number of homes closed per year					Decrease
Discount rate				8.70%
Discount rate					Decrease
Discount rate					Increase