Note 10 - Stock Based Compensation (Details) - Summary of Stock Option Awards And Changes (USD $)	0 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Oct. 28, 2013	Oct. 27, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding-Number (in Shares)	861,905	861,905	900,000	3,900,000	725,529	691,809	481,699
Options Outstanding-Weighted Average Remaining Contractual Term (in years)	6 years 219 days	10 years
Options Outstanding- Weighted Average Exercise Price	$ 12.29	$ 12.29			$ 14.63	$ 16.88	$ 1,782
Options Exercisable-Number (in Shares)	601,482	601,482
Options Exercisable-Weighted Average Remaining Contractual Term (in years)		6 years 109 days
Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices-Minimum		$ 0.50
Range of Exercise Prices Maximum		$ 8.99
Options Outstanding-Number (in Shares)	189,630	189,630
Options Outstanding-Weighted Average Remaining Contractual Term (in years)		9 years 109 days
Options Outstanding- Weighted Average Exercise Price	$ 4.46	$ 4.46
Options Exercisable-Number (in Shares)	62,513	62,513
Options Exercisable-Weighted Average Remaining Contractual Term (in years)		9 years 109 days
Options Exercisable- Weighted Average Exercise Price	$ 4.46	$ 4.46
Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices-Minimum		$ 9.00
Range of Exercise Prices Maximum		$ 13.50
Options Outstanding-Number (in Shares)	477,553	477,553
Options Outstanding-Weighted Average Remaining Contractual Term (in years)		6 years 36 days
Options Outstanding- Weighted Average Exercise Price	$ 11.12	$ 11.12
Options Exercisable-Number (in Shares)	356,524	356,524
Options Exercisable-Weighted Average Remaining Contractual Term (in years)		5 years 146 days
Options Exercisable- Weighted Average Exercise Price	$ 11.43	$ 11.43
Range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices-Minimum		$ 13.51
Range of Exercise Prices Maximum		$ 30.00
Options Outstanding-Number (in Shares)	183,620	183,620
Options Outstanding-Weighted Average Remaining Contractual Term (in years)		4 years 73 days
Options Outstanding- Weighted Average Exercise Price	$ 21.33	$ 21.33
Options Exercisable-Number (in Shares)	171,343	171,343
Options Exercisable-Weighted Average Remaining Contractual Term (in years)		4 years
Options Exercisable- Weighted Average Exercise Price	$ 21.67	$ 21.67
Range Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices-Minimum		$ 30.00
Options Outstanding-Number (in Shares)	11,102	11,102
Options Outstanding-Weighted Average Remaining Contractual Term (in years)		328 days
Options Outstanding- Weighted Average Exercise Price	$ 57.29	$ 57.29
Options Exercisable-Number (in Shares)	11,102	11,102
Options Exercisable-Weighted Average Remaining Contractual Term (in years)		328 days
Options Exercisable- Weighted Average Exercise Price	$ 57.29	$ 57.29