Note 10 - Summary of the Status of the Options Outstanding (Details)	9 Months Ended
	Sep. 30, 2015 $ / shares shares
Exercise Price 1 [Member]
100,000 (in shares)	100,000
100,000	4 years 354 days
100,000 (in dollars per share) | $ / shares	$ 0.22
100,000 (in shares)	0
100,000 (in dollars per share) | $ / shares	$ 0.22
Exercise Price 2 [Member]
100,000 (in shares)	200,000
100,000	9 years 138 days
100,000 (in dollars per share) | $ / shares	$ 0.66
100,000 (in shares)	150,000
100,000 (in dollars per share) | $ / shares	$ 0.66
Exercise Price 3 [Member]
100,000 (in shares)	150,000
100,000	9 years 131 days
100,000 (in dollars per share) | $ / shares	$ 0.68
100,000 (in shares)	0
100,000 (in dollars per share) | $ / shares	$ 0
Exercise Price 4 [Member]
100,000 (in shares)	7,233,277
100,000	3 years 91 days
100,000 (in dollars per share) | $ / shares	$ 0.70
100,000 (in shares)	7,233,277
100,000 (in dollars per share) | $ / shares	$ 0.70
Exercise Price 5 [Member]
100,000 (in shares)	488,356
100,000	9 years 233 days
100,000 (in dollars per share) | $ / shares	$ 0.73
100,000 (in shares)	59,589
100,000 (in dollars per share) | $ / shares	$ 0.73
Exercise Price 6 [Member]
100,000 (in shares)	3,405,134
100,000	5 years 343 days
100,000 (in dollars per share) | $ / shares	$ 0.83
100,000 (in shares)	3,405,134
100,000 (in dollars per share) | $ / shares	$ 0.83
Exercise Price 7 [Member]
100,000 (in shares)	975,000
100,000	8 years 255 days
100,000 (in dollars per share) | $ / shares	$ 0.84
100,000 (in shares)	641,667
100,000 (in dollars per share) | $ / shares	$ 0.84
Exercise Price 8 [Member]
100,000 (in shares)	60,000
100,000	273 days
100,000 (in dollars per share) | $ / shares	$ 1
100,000 (in shares)	60,000
100,000 (in dollars per share) | $ / shares	$ 1
Exercise Price 9 [Member]
100,000 (in shares)	300,000
100,000	7 years 328 days
100,000 (in dollars per share) | $ / shares	$ 1.10
100,000 (in shares)	200,000
100,000 (in dollars per share) | $ / shares	$ 1.10
Exercise Price 10 [Member]
100,000 (in shares)	300,000
100,000	7 years 270 days
100,000 (in dollars per share) | $ / shares	$ 1.15
100,000 (in shares)	208,333
100,000 (in dollars per share) | $ / shares	$ 1.15
Exercise Price 11 [Member]
100,000 (in shares)	100,000
100,000	2 years 124 days
100,000 (in dollars per share) | $ / shares	$ 1.24
100,000 (in shares)	100,000
100,000 (in dollars per share) | $ / shares	$ 1.24
Exercise Price 12 [Member]
100,000 (in shares)	115,000
100,000	5 years 178 days
100,000 (in dollars per share) | $ / shares	$ 1.35
100,000 (in shares)	115,000
100,000 (in dollars per share) | $ / shares	$ 1.35
Exercise Price 13 [Member]
100,000 (in shares)	125,000
100,000	2 years 124 days
100,000 (in dollars per share) | $ / shares	$ 1.45
100,000 (in shares)	125,000
100,000 (in dollars per share) | $ / shares	$ 1.45
Exercise Price 14 [Member]
100,000 (in shares)	330,000
100,000	6 years 73 days
100,000 (in dollars per share) | $ / shares	$ 1.55
100,000 (in shares)	330,000
100,000 (in dollars per share) | $ / shares	$ 1.55
Exercise Price 15 [Member]
100,000 (in shares)	7,645
100,000	2 years 124 days
100,000 (in dollars per share) | $ / shares	$ 1.58
100,000 (in shares)	7,645
100,000 (in dollars per share) | $ / shares	$ 1.58
Exercise Price 16 [Member]
100,000 (in shares)	3,077,060
100,000	7 years 54 days
100,000 (in dollars per share) | $ / shares	$ 1.66
100,000 (in shares)	3,077,060
100,000 (in dollars per share) | $ / shares	$ 1.66
Exercise Price 17 [Member]
100,000 (in shares)	900,000
100,000	5 years 324 days
100,000 (in dollars per share) | $ / shares	$ 1.90
100,000 (in shares)	900,000
100,000 (in dollars per share) | $ / shares	$ 1.90
100,000 (in shares)	17,866,472
100,000	5 years 131 days
100,000 (in dollars per share) | $ / shares	$ 1
100,000 (in shares)	16,612,705
100,000 (in dollars per share) | $ / shares	$ 1.02