Note 4 - Real Estate Inventories - Inventory Impairments (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Impairments		$ 19,000	$ 0	$ 19,000	$ 0
Remaining carrying value of inventory impaired at period end		$ 79,033	$ 0	$ 79,033	$ 0
Number of projects impaired during the period		5	0	5	0
Total number of projects subject to periodic impairment review during period (1)	[1]	27	25	27	27
Home Building [Member]
Impairments		$ 19,000	$ 0	$ 19,000	$ 0

[1] Represents the peak number of real estate projects that we had during each respective period. The number of projects outstanding at the end of each period may be less than the number of projects listed herein.