Note 5 - Capitalized Interest - Summary of Interest Incurred, Capitalized, and Expensed (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest incurred	$ 6,150	$ 7,606	$ 12,530	$ 15,367
Interest capitalized to inventory	(4,879)	(7,606)	(10,541)	(15,367)
Interest expensed	1,271	(0)	1,989	(0)
Capitalized interest in beginning inventory	25,152	28,600	26,397	25,681
Interest capitalized as a cost of inventory	4,879	7,606	10,541	15,367
Capitalized interest transferred from investment in unconsolidated joint ventures to inventory upon lot acquisition	0	3	0	13
Previously capitalized interest included in cost of home and land sales	(4,601)	(6,301)	(10,747)	(11,153)
Previously capitalized interest included in project abandonment costs	0	0	(761)	0
Capitalized interest in ending inventory	25,430	29,908	25,430	29,908
Capitalized interest in beginning investment in unconsolidated joint ventures	93	672	541	713
Capitalized interest transferred from investment in unconsolidated joint ventures to inventory upon lot acquisition	0	(3)	0	(13)
Previously capitalized interest included in equity in net income (loss) of unconsolidated joint ventures	(31)	(48)	(479)	(79)
Capitalized interest in ending investment in unconsolidated joint ventures	62	621	62	621
Total capitalized interest in ending inventory and investments in unconsolidated joint ventures	$ 25,492	$ 30,529	$ 25,492	$ 30,529
Capitalized interest as a percentage of inventory	6.90%	5.50%	6.90%	5.50%
Interest included in cost of home sales as a percentage of home sales revenue	6.00%	4.40%	6.20%	4.70%
Capitalized interest as a percentage of investment in and advances to unconsolidated joint ventures	0.50%	1.80%	0.50%	1.80%