Note 8 - Warrants to Purchase Common Stock (Details) (USD $)	6 Months Ended
	Jun. 30, 2014
Option outstanding, Begining balance	8,315,958
Option Granted	1,264,000
Option Exercised
Option Cancelled	(2,359,233)
Option outstanding, Ending balance	7,220,725
Options exercisable at End	5,750,346
Outstanding at Beginning, Weighted-Average Exercise Price	$ 0.42
Weighted- Average Exercise Price, Granted	$ 0.26
Weighted- Average Exercise Price, Exercised
Weighted- Average Exercise Price, Cancelled	$ 0.5
Outstanding at Ending, , Weighted-Average Exercise Price	$ 0.36
Weighted- Average exercisable at End	$ 0.39
Weighted- Average Remaining Contractual Term, Beginning balance	9 years 1 month 2 days
Weighted- Average Remaining Contractual Term, Granted	9 years 7 months 10 days
Weighted- Average Remaining Contractual Term, Ending Balance	8 years 7 months 6 days
Weighted- Average Remaining Contractual Term, exercisable at End	8 years 9 months 15 days
Warrant [Member]
Option outstanding, Begining balance	10,486,066
Option Granted	1,596,361
Option Exercised
Option Cancelled	(17,900)
Option outstanding, Ending balance	12,064,527
Options exercisable at End	12,064,527
Outstanding at Beginning, Weighted-Average Exercise Price	$ 0.98
Weighted- Average Exercise Price, Granted	$ 0.60
Weighted- Average Exercise Price, Exercised
Weighted- Average Exercise Price, Cancelled	$ 3.00
Outstanding at Ending, , Weighted-Average Exercise Price	$ 0.93
Weighted- Average exercisable at End	$ 0.93
Weighted- Average Remaining Contractual Term, Beginning balance	9 months 29 days
Weighted- Average Remaining Contractual Term, Granted	4 years 8 months 23 days
Weighted- Average Remaining Contractual Term, Ending Balance	1 year 4 months 13 days
Weighted- Average Remaining Contractual Term, exercisable at End	1 year 4 months 13 days