Note 11 - Derivative Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Jul. 31, 2011	Jan. 31, 2011	Jun. 30, 2013 $40 Million Secured Debt Facility [Member]	May 31, 2013 $40 Million Secured Debt Facility [Member]	Dec. 31, 2012 $40 Million Secured Debt Facility [Member]	Jan. 31, 2011 $40 Million Secured Debt Facility [Member]	Jun. 30, 2013 $75 Million Secured Debt Facility [Member]	Dec. 31, 2012 $75 Million Secured Debt Facility [Member]	Jul. 31, 2011 $75 Million Secured Debt Facility [Member]
Note 11 - Derivative Financial Instruments (Details) [Line Items]
Debt Instrument, Face Amount (in Dollars)		$ 75,000	$ 40,000	$ 40,000	$ 25,500	$ 40,000	$ 40,000	$ 75,000	$ 75,000	$ 75,000
Arranger Fee	18.00%			18.00%				12.00%