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Note 10 - Debt Obligations (Details) - Convertible Debt Interest Expense (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Note 10 - Debt Obligations (Details) - Convertible Debt Interest Expense [Line Items]        
Amortization of Debt Discount Expense     $ 4,263 $ 5,071
Amortization of Debt Issue Costs 344 740 718 1,418
Convertible Notes 2017 [Member]
        
Note 10 - Debt Obligations (Details) - Convertible Debt Interest Expense [Line Items]        
Interest Expense Related to Contractual Interest Coupon 3,530   6,585  
Amortization of Debt Discount Expense 994   1,953  
Amortization of Debt Issue Costs 157   292  
Interest Expense Related to Convertible Notes 4,681   8,830  
Convertible Notes 2015 [Member]
        
Note 10 - Debt Obligations (Details) - Convertible Debt Interest Expense [Line Items]        
Interest Expense Related to Contractual Interest Coupon 1,043 2,777 2,439 5,555
Amortization of Debt Discount Expense 707 1,862 1,592 3,653
Amortization of Debt Issue Costs 187 250 426 495
Interest Expense Related to Convertible Notes $ 1,937 $ 4,889 $ 4,457 $ 9,703