Note 9 - Commitments and Contingencies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense	$ 17,800,000	$ 17,000,000	$ 12,500,000
Defined Contribution Plan, Cost Recognized	$ 1,200,000	$ 970,000	$ 571,000