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Note 10 - Debt (Details) - Debt (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Mar. 31, 2010
Note 10 - Debt (Details) - Debt [Line Items]      
$ 205,112 $ 221,206  
Less: Current maturity of long-term debt   24,046  
Long-term debt, net 205,112 197,160  
Convertible Notes 2017 [Member]
      
Note 10 - Debt (Details) - Debt [Line Items]      
Convertible Notes 124,457 [1]    [1]  
2015 Convertible Notes [Member]
      
Note 10 - Debt (Details) - Debt [Line Items]      
Convertible Notes 80,655 [2] 153,479 [2] 136,300
$75 Million Secured Debt Facility [Member]
      
Note 10 - Debt (Details) - Debt [Line Items]      
Secured Debt Facility   35,000  
$40 Million Secured Debt Facility [Member]
      
Note 10 - Debt (Details) - Debt [Line Items]      
Secured Debt Facility   $ 32,727  
[1] The Company estimated the fair value of the 2017 Convertible Notes to be approximately $135.1 million and none at September 30, 2013 and December 31, 2012, respectively, based on observed market prices for the same or similar types of debt issues. The fair value of the 2017 Convertible Notes is considered to be a Level 1 measurement on the fair value hierarchy.
[2] The Company estimated the fair value of the 2015 Convertible Notes to be approximately $79.4 million and $147.9 million at September 30, 2013 and December 31, 2012, respectively, based on observed market prices for the same or similar types of debt issues. The fair value of the 2015 Convertible Notes is considered to be a Level 1 measurement on the fair value hierarchy.