Note 12 - Stock Based Compensation Plans (Details) - Summary of Information About Stock Options Outstanding (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Outstanding (in Shares)	3,550,599
Weighted Average Exercise Price	$ 0.99
Number Exercisable (in Shares)	2,285,970
Weighted Average Exercise Price, Exercisable	$ 0.61
Price Range 1 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Upper Exercise Price	$ 1.00
Number Outstanding (in Shares)	2,038,205
Weighted Average Remaining Contractual Life	5 years 21 days
Weighted Average Exercise Price	$ 0.53
Number Exercisable (in Shares)	1,954,614
Weighted Average Exercise Price, Exercisable	$ 0.51
Price Range 2 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Exercise Price	$ 1.00
Upper Exercise Price	$ 2.00
Number Outstanding (in Shares)	1,057,894
Weighted Average Remaining Contractual Life	8 years 156 days
Weighted Average Exercise Price	$ 1.39
Number Exercisable (in Shares)	330,106
Weighted Average Exercise Price, Exercisable	$ 1.20
Price Range 3 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Exercise Price	$ 2.01
Upper Exercise Price	$ 4.00
Number Outstanding (in Shares)	454,500
Weighted Average Remaining Contractual Life	9 years 211 days
Weighted Average Exercise Price	$ 2.13
Number Exercisable (in Shares)	1,250
Weighted Average Exercise Price, Exercisable	$ 2.15