Note 11 - Warrants to Purchase Common Stock (Details) (USD $)	1 Months Ended	12 Months Ended
	Aug. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Option outstanding, Begining balance		8,315,958	7,384,618
Option Granted		1,329,000	4,970,000
Option Exercised		0	(110,092)
Option Expired		(2,834,192)	(3,928,568)
Option outstanding, Ending balance		6,810,766	8,315,958
Options exercisable at End		6,079,806
Outstanding at Beginning, Weighted-Average Exercise Price		$ 0.42	$ 0.34
Weighted- Average Exercise Price, Granted		$ 0.21	$ 0.48
Weighted- Average Exercise Price, Exercised	$ 0.11	$ 0.00	$ 0.36
Weighted- Average Exercise Price, Expired		$ 0.46	$ 0.35
Outstanding at Ending, Weighted-Average Exercise Price		$ 0.26	$ 0.42
Weighted- Average exercisable at End		$ 0.36
Weighted- Average Remaining Contractual Term, Beginning balance		9 years 1 month 2 days	8 years 3 months 18 days
Weighted- Average Remaining Contractual Term, Granted		9 years 1 month 8 days	9 years 10 months 13 days
Weighted- Average Remaining Contractual Term, Ending Balance		8 years 1 month 10 days	9 years 1 month 2 days
Weighted- Average Remaining Contractual Term, exercisable at End		8 years 4 months 13 days
Warrant [Member]
Option outstanding, Begining balance		10,486,066	661,947
Option Granted		6,891,543	9,887,169
Option Exercised		0	0
Option Expired		(323,897)	(63,050)
Option outstanding, Ending balance		17,053,712	10,486,066
Options exercisable at End		17,053,712
Outstanding at Beginning, Weighted-Average Exercise Price		$ 1.00	$ 0.80
Weighted- Average Exercise Price, Granted		$ 0.31	$ 1.00
Weighted- Average Exercise Price, Exercised		$ 0.00	$ 0.00
Weighted- Average Exercise Price, Expired		$ 3.00	$ 3.00
Outstanding at Ending, Weighted-Average Exercise Price		$ 0.71	$ 1.00
Weighted- Average exercisable at End		$ 0.71
Weighted- Average Remaining Contractual Term, Beginning balance		1 year 4 months 10 days	1 year 3 months 22 days
Weighted- Average Remaining Contractual Term, Granted		4 years 7 months 6 days	1 year 4 months 10 days
Weighted- Average Remaining Contractual Term, Ending Balance		2 years 29 days	1 year 4 months 10 days
Weighted- Average Remaining Contractual Term, exercisable at End		2 years 29 days