Note 9 - Commitments and Contingencies (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Operating Leases, Rent Expense	$ 2,400,000	$ 2,100,000	$ 7,100,000	$ 5,800,000
Defined Contribution Plan, Cost Recognized	149,000		380,000
Letters of Credit Outstanding, Amount	$ 83,000		$ 83,000		$ 190,000