Note 14 - Income Taxes (Details) - Components of Deferred Tax Assets and Liabilities (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Deferred tax assets:
Federal net operating loss carryforwards	$ 60,887	$ 70,770
State net operating loss carryforwards	41,625	40,012
Alternative minimum tax and other tax credit carryforwards	24,772	24,196
Stock-based compensation expense	25,923	26,651
Warranty, litigation and other reserves	14,186	15,543
Receivables from related party	12,081	12,132
Deferred compensation retirement plans and accrued compensation	4,313	11,136
Asset impairment charges	4,099	5,496
Inventory, additional costs capitalized for tax purposes	1,914	1,700
Other, net	4,070	3,446
Total deferred tax assets	193,870	211,082
Valuation allowance	(14,988)	(14,669)
Total deferred tax assets, net of valuation allowance	178,882	196,413
Deferred tax liabilities:
Property, equipment and other assets	5,242	5,512
Discount on notes receivable	4,204	4,204
Deferred revenue	3,715	3,985
Unrealized gain on marketable securities	3,388	4,915
Other, net	1,461	1,535
Total deferred tax liabilities	18,010	20,151
Net deferred tax asset	$ 160,872	$ 176,262