Note 4 - Property, Equipment and Leasehold Improvements (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Property, Plant and Equipment [Abstract]
Depreciation	$ 1.6	$ 1.6	$ 3.3	$ 3.0