Note 9 - Commitments and Contingencies (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Mar. 31, 2012	Dec. 31, 2011
Operating Leases, Rent Expense	$ 2,400,000	$ 2,200,000	$ 4,700,000	$ 3,700,000
Defined Contribution Plan, Cost Recognized	133,000		231,000
Letters of Credit Outstanding, Amount	$ 83,000		$ 83,000		$ 83,000	$ 190,000