Note 10 - Debt (Details) - Debt (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Note 10 - Debt (Details) - Debt [Line Items]
$170.9 million Convertible Notes, 6.5%, due March 2015, net of discount of ($13.8) million at June 30, 2013 and ($17.4) million at December 31, 2012	$ 157,132	$ 153,479
	197,132	221,206
Less: Current maturity of long-term debt	17,000	24,046
Long-term debt, net	180,132	197,160
$170.9 Million Convertible Notes [Member]
Note 10 - Debt (Details) - Debt [Line Items]
$170.9 million Convertible Notes, 6.5%, due March 2015, net of discount of ($13.8) million at June 30, 2013 and ($17.4) million at December 31, 2012	157,100
$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	$ 40,000	$ 32,727