Note 9 - Commitments and Contingencies (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense	$ 4,400,000	$ 3,900,000	$ 13,100,000	$ 11,100,000
Defined Contribution Plan, Cost Recognized	$ 245,000	$ 230,000	$ 921,000	$ 691,000