Note 4 - Property, Equipment and Leasehold Improvements (Details) - Property, Equipment and Leasehold Improvements (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 22,872	$ 20,620
Less accumulated depreciation and amortization	12,807	10,287
Total	10,065	10,333
Building [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	15 years
Property, plant, and equipment	600	600
Computer and Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Property, plant, and equipment	17,258	15,557
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	2,969	2,586
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Leasehold improvements	$ 2,045	$ 1,877
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Leasehold improvements	Lease term