Note 15 - Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
State net operating loss carryforwards	$ 10,123	$ 18,045
Stock-based compensation expense	10,493	11,767
Warranty, litigation and other reserves	12,784	12,844
Accrued compensation	2,592	2,622
Asset impairment charges	3,526	5,848
Inventory, additional costs capitalized for tax purposes	7,228	5,863
Other, net	910	1,680
Total deferred tax assets	47,656	58,669
Valuation allowance	(6,498)	(7,598)
Total deferred tax assets, net of valuation allowance	41,158	51,071
Property, equipment and other assets	9,551	8,440
Deferral of profit on home sales	3,359	1,817
Unrealized gain on marketable securities	2,716	375
Other, net	3,764	3,261
Total deferred tax liabilities	19,390	13,893
Net deferred tax asset	$ 21,768	$ 37,178