Note 8 - Stock-Based Compensation (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2013	Mar. 31, 2011	Jun. 30, 2013 Salaries, Wages, and Related Expenses [Member]	Jun. 30, 2012 Salaries, Wages, and Related Expenses [Member]	Jun. 30, 2013 Salaries, Wages, and Related Expenses [Member]	Jun. 30, 2012 Salaries, Wages, and Related Expenses [Member]	Jun. 30, 2013 General Supplies and Expenses [Member]
Note 8 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)				750,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)	743,124		743,124
Allocated Share-based Compensation Expense					$ (300,000)	$ 300,000	$ (100,000)	$ 400,000	$ 100,000
Reversal of Previous Stock Compensation Expense			(409,000)
Shares Paid for Tax Withholding for Share Based Compensation (in Shares)		33,243
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased (in Dollars per share)		$ 6.03
Adjustments Related to Tax Withholding for Share-based Compensation	$ 200,000