Note 10 - Debt (Details) - Estimated Remaining Cash Payments (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Convertible Notes 2017 [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments	$ 192,626
Twenty Fifteen Convertible Notes [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments	94,264
Year Two [Member] | Convertible Notes 2017 [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments	12,219
Year Two [Member] | Twenty Fifteen Convertible Notes [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments	5,583
Year Three [Member] | Convertible Notes 2017 [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments	12,219
Year Three [Member] | Twenty Fifteen Convertible Notes [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments	88,681
Year Four [Member] | Convertible Notes 2017 [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments	12,219
Year Five [Member] | Convertible Notes 2017 [Member]
Debt Instrument [Line Items]
Estimated Remaining Cash Payments	$ 155,969