Note 11 - Employee Benefit Plan (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Contribution Plan, Maximum Employer Annual Contribution Per Employee Percent	50.00%
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Amount	$ 7,500
Defined Contribution Plan, Cost Recognized	$ 130,000	$ 208,000	$ 339,000