Note 4 - Property, Equipment and Leasehold Improvements (Details) - Property, Equipment and Leasehold Improvements - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 38,154	$ 30,824
Less accumulated depreciation and amortization	18,009	15,098
Totals	$ 20,145	15,726
Building [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	15 years
Property, plant, and equipment, gross	$ 3,669	2,554
Computer and Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Property, plant, and equipment, gross	$ 23,162	19,160
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	5,051	4,274
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 6,272	$ 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