Note 9 - Commitments and Contingencies (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Operating Leases, Rent Expense	$ 2,300,000	$ 1,500,000
Defined Contribution Plan, Cost Recognized	98,000
Letters of Credit Outstanding, Amount	$ 273,000	$ 190,000