Note 4 - Property, Equipment and Leasehold Improvements (Detail) - Property, Equipment and Leasehold Improvements (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Property, plant, and equipment	$ 21,806	$ 20,620
Less accumulated depreciation and amortization	11,674	10,287
Total	10,132	10,333
Building [Member]
Estimated useful lives	15
Property, plant, and equipment	600	600
Computer and Office Equipment [Member]
Estimated useful lives	3
Property, plant, and equipment	16,368	15,557
Furniture and Fixtures [Member] | Minimum [Member]
Estimated useful lives	3
Furniture and Fixtures [Member] | Maximum [Member]
Estimated useful lives	5
Furniture and Fixtures [Member]
Estimated useful lives
Property, plant, and equipment	2,878	2,586
Leasehold Improvements [Member] | Minimum [Member]
Estimated useful lives	Lease term
Leasehold Improvements [Member]
Property, plant, and equipment	$ 1,960	$ 1,877