Note 9 - Commitments and Contingencies (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Commitments and Contingencies Disclosure [Text Block]
Operating Leases, Rent Expense	$ 3,100,000	$ 2,400,000	$ 6,100,000	$ 4,700,000
Defined Contribution Plan, Cost Recognized	$ 138,000	$ 133,000	$ 277,000	$ 231,000