Note 11 - Employee Retirement Plan (Detail) (USD $)	1 Months Ended	12 Months Ended
	Mar. 31, 2009	Dec. 31, 2012	Dec. 31, 2011
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent		25.00%
Defined Contribution Period In Years		4 years
Treasury Stock, Number of Shares Held (in Shares)		26
Stock Issued During Period, Shares, Treasury Stock Reissued (in Shares)	8,055
Defined Contribution Plan, Employer Matching Contribution, Percent		10.00%	10.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount (in Dollars)		$ 30,000	$ 32,000
Non Cash Stock Based Compensation [Member]
Defined Contribution Plan, Cost Recognized (in Dollars)	82,000
Maximum Of All Eligible Employee Contributions [Member]
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent		6.00%