Note 5 - Capitalized Interest - Summary of Interest Incurred, Capitalized, and Expensed (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest incurred	$ 23,936	$ 28,819	$ 28,377
Interest capitalized to inventory	(20,281)	(28,819)	(27,393)
Interest capitalized to investment in unconsolidated joint ventures	0	0	(984)
Interest expensed	3,655	0	0
Capitalized interest in beginning inventory	26,397	25,681	16,453
Interest capitalized as a cost of inventory	20,281	28,819	27,393
Capitalized interest transferred from investment in unconsolidated joint ventures to inventory upon lot acquisition	0	31	513
Previously capitalized interest included in cost of home and land sales	(23,864)	(28,134)	(18,678)
Previously capitalized interest included in project abandonment costs	(761)	0	0
Capitalized interest in ending inventory	22,053	26,397	25,681
Capitalized interest in beginning investment in unconsolidated joint ventures	541	713	1,472
Interest capitalized to investment in unconsolidated joint ventures	0	0	984
Capitalized interest transferred from investment in unconsolidated joint ventures to inventory upon lot acquisition	0	(31)	(513)
Previously capitalized interest included in equity in net loss of unconsolidated joint ventures	(541)	(141)	(1,230)
Capitalized interest in ending investment in unconsolidated joint ventures	0	541	713
Total capitalized interest in ending inventory and investments in unconsolidated joint ventures	$ 22,053	$ 26,938	$ 26,394
Capitalized interest as a percentage of inventory	7.00%	6.10%	4.50%
Interest included in cost of home sales as a percentage of home sales revenue	5.60%	4.90%	3.70%
Capitalized interest as a percentage of investment in and advances to unconsolidated joint ventures	0.00%	1.80%	2.10%