Note 11 - Long-Term Debt Interest Expense Recognized Related to Convertible Debt (Details) (Convertible Debt [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Convertible Senior Notes Due 2017
Schedule of Interest Expense Recognized Related to Convertible Debt [Line Items]
Contractual interest expense of convertible debt	$ 13,500	$ 13,500
Amortization of debt issuance costs	1,157	1,094
Amortization of debt discount	19,544	17,756
Total interest expense for convertible debt	34,201	32,350
Debt Instrument, Interest Rate, Effective Percentage	9.75%	9.75%
Convertible Senior Notes Due 2019
Schedule of Interest Expense Recognized Related to Convertible Debt [Line Items]
Contractual interest expense of convertible debt	7,425
Amortization of debt issuance costs	1,025
Amortization of debt discount	9,223
Total interest expense for convertible debt	$ 17,673
Debt Instrument, Interest Rate, Effective Percentage	6.25%