Note 4 - Property, Equipment and Leasehold Improvements (Details) - Property, Equipment and Leasehold Improvements - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 33,141	$ 30,824
Less accumulated depreciation and amortization	16,063	15,098
Totals	$ 17,078	15,726
Building [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	15 years
Property, plant, and equipment, gross	$ 2,661	2,553
Computer and Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Property, plant, and equipment, gross	$ 19,972	19,161
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	4,836	4,274
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 5,672	$ 4,836
Minimum [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Maximum [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years