Note 5 - Capitalized Interest - Summary of Interest Incurred, Capitalized, and Expensed (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest incurred	$ 28,819	$ 28,377	$ 21,978
Interest capitalized to inventory	(28,819)	(27,393)	(20,394)
Interest capitalized to investment in unconsolidated joint ventures	0	(984)	(1,584)
Interest expensed	0	0	0
Capitalized interest in beginning inventory	25,681	16,453	6,342
Interest capitalized as a cost of inventory	28,819	27,393	20,394
Capitalized interest acquired from unconsolidated joint ventures at consolidation	0	0	738
Capitalized interest transferred from investment in unconsolidated joint ventures to inventory upon lot acquisition	31	513	0
Previously capitalized interest included in cost of home and land sales	(28,134)	(18,678)	(11,021)
Capitalized interest in ending inventory	26,397	25,681	16,453
Capitalized interest in beginning investment in unconsolidated joint ventures	713	1,472	0
Interest capitalized to investment in unconsolidated joint ventures	0	984	1,584
Capitalized interest transferred from investment in unconsolidated joint ventures to inventory upon consolidation	0	0	(76)
Capitalized interest transferred from investment in unconsolidated joint ventures to inventory upon lot acquisition	(31)	(513)	0
Previously capitalized interest included in equity in net income (loss) of unconsolidated joint ventures	(141)	(1,230)	(36)
Capitalized interest in ending investment in unconsolidated joint ventures	541	713	1,472
Total capitalized interest in ending inventory and investments in unconsolidated joint ventures	$ 26,938	$ 26,394	$ 17,925
Capitalized interest as a percentage of inventory	6.10%	4.50%	4.00%
Interest included in cost of home sales as a percentage of home sales revenue	4.90%	3.70%	2.00%
Capitalized interest as a percentage of investment in and advances to unconsolidated joint ventures	1.80%	2.10%	2.60%