Note 14 - Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
State net operating loss carryforwards	$ 18,045	$ 25,398
Stock-based compensation expense	11,767	10,280
Warranty, litigation and other reserves	12,844	10,763
Accrued compensation	2,622	699
Asset impairment charges	5,848	3,738
Inventory, additional costs capitalized for tax purposes	5,863	4,260
Other, net	1,680	1,887
Total deferred tax assets	58,669	57,025
Valuation allowance	(7,598)	(8,170)
Total deferred tax assets, net of valuation allowance	51,071	48,855
Deferred tax liabilities:
Property, equipment and other assets	8,440	3,705
Deferral of profit on home sales	1,817
Unrealized gain on marketable securities	375	1,290
Other, net	3,261	2,380
Total deferred tax liabilities	13,893	7,375
Net deferred tax asset	$ 37,178	$ 41,480