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Note 6 - Fair Value Measurements (Details) - Quantitative Data Regarding Unobservable Inputs and Sensitivity Analysis
$ / item in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Mar. 31, 2015
Jun. 30, 2014
Sep. 30, 2015
$ / item
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Number of homes closed per year       Increase
Number of homes closed per year       Decrease
Average sales price       Increase
Average sales price       Decrease
Discount rate   8.70%    
Discount rate       Decrease
Discount rate       Increase
Minimum [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Number of homes closed per year       0
Average sales price       350
Discount rate 12.00%   11.00% 5.00%
Maximum [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Number of homes closed per year       122
Average sales price       1,200
Discount rate 15.00%   13.80% 12.00%
Weighted Average [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Number of homes closed per year       94
Average sales price       400
Discount rate       8.10%