Note 9 - Summary of the Status of the Options Outstanding (Details) | 3 Months Ended |
Mar. 31, 2016$ / sharesshares |
Exercise Price 1 [Member] | |
Options Outstanding, Number (in shares) | shares | 81,395 |
Options Outstanding, Weighted Average Remaining Contractual Life | 7 years 324 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.21 |
Options Exercisable, Number (in shares) | shares | 0 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.21 |
Exercise Price 2 [Member] | |
Options Outstanding, Number (in shares) | shares | 100,000 |
Options Outstanding, Weighted Average Remaining Contractual Life | 4 years 171 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.22 |
Options Exercisable, Number (in shares) | shares | 50,002 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.22 |
Exercise Price 3 [Member] | |
Options Outstanding, Number (in shares) | shares | 35,595 |
Options Outstanding, Weighted Average Remaining Contractual Life | 7 years 14 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.27 |
Options Exercisable, Number (in shares) | shares | 0 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.27 |
Exercise Price 4 [Member] | |
Options Outstanding, Number (in shares) | shares | 474,815 |
Options Outstanding, Weighted Average Remaining Contractual Life | 8 years 40 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.28 |
Options Exercisable, Number (in shares) | shares | 62,500 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.28 |
Exercise Price 5 [Member] | |
Options Outstanding, Number (in shares) | shares | 234,506 |
Options Outstanding, Weighted Average Remaining Contractual Life | 6 years 324 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.285 |
Options Exercisable, Number (in shares) | shares | 234,506 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.285 |
Exercise Price 6 [Member] | |
Options Outstanding, Number (in shares) | shares | 81,522 |
Options Outstanding, Weighted Average Remaining Contractual Life | 4 years 295 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.30 |
Options Exercisable, Number (in shares) | shares | 0 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.30 |
Exercise Price 7 [Member] | |
Options Outstanding, Number (in shares) | shares | 200,000 |
Options Outstanding, Weighted Average Remaining Contractual Life | 8 years 321 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.66 |
Options Exercisable, Number (in shares) | shares | 200,000 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.66 |
Exercise Price 8 [Member] | |
Options Outstanding, Number (in shares) | shares | 150,000 |
Options Outstanding, Weighted Average Remaining Contractual Life | 8 years 313 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.68 |
Options Exercisable, Number (in shares) | shares | 49,995 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.68 |
Exercise Price 9 [Member] | |
Options Outstanding, Number (in shares) | shares | 7,233,277 |
Options Outstanding, Weighted Average Remaining Contractual Life | 2 years 273 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.70 |
Options Exercisable, Number (in shares) | shares | 7,233,277 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.70 |
Exercise Price 10 [Member] | |
Options Outstanding, Number (in shares) | shares | 488,356 |
Options Outstanding, Weighted Average Remaining Contractual Life | 9 years 47 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.73 |
Options Exercisable, Number (in shares) | shares | 128,767 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.73 |
Exercise Price 11 [Member] | |
Options Outstanding, Number (in shares) | shares | 3,405,134 |
Options Outstanding, Weighted Average Remaining Contractual Life | 5 years 160 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.83 |
Options Exercisable, Number (in shares) | shares | 3,405,134 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.83 |
Exercise Price 12 [Member] | |
Options Outstanding, Number (in shares) | shares | 975,000 |
Options Outstanding, Weighted Average Remaining Contractual Life | 8 years 73 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.84 |
Options Exercisable, Number (in shares) | shares | 741,667 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.84 |
Exercise Price 13 [Member] | |
Options Outstanding, Number (in shares) | shares | 300,000 |
Options Outstanding, Weighted Average Remaining Contractual Life | 7 years 142 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.10 |
Options Exercisable, Number (in shares) | shares | 200,000 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.10 |
Exercise Price 14 [Member] | |
Options Outstanding, Number (in shares) | shares | 300,000 |
Options Outstanding, Weighted Average Remaining Contractual Life | 7 years 87 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.15 |
Options Exercisable, Number (in shares) | shares | 258,333 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.15 |
Exercise Price 15 [Member] | |
Options Outstanding, Number (in shares) | shares | 100,000 |
Options Outstanding, Weighted Average Remaining Contractual Life | 1 year 306 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.24 |
Options Exercisable, Number (in shares) | shares | 100,000 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.24 |
Exercise Price 16 [Member] | |
Options Outstanding, Number (in shares) | shares | 115,000 |
Options Outstanding, Weighted Average Remaining Contractual Life | 4 years 361 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.35 |
Options Exercisable, Number (in shares) | shares | 115,000 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.35 |
Exercise Price 17 [Member] | |
Options Outstanding, Number (in shares) | shares | 125,000 |
Options Outstanding, Weighted Average Remaining Contractual Life | 1 year 306 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.45 |
Options Exercisable, Number (in shares) | shares | 125,000 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.45 |
Exercise Price 18 [Member] | |
Options Outstanding, Number (in shares) | shares | 330,000 |
Options Outstanding, Weighted Average Remaining Contractual Life | 5 years 255 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.55 |
Options Exercisable, Number (in shares) | shares | 330,000 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.55 |
Exercise Price 19 [Member] | |
Options Outstanding, Number (in shares) | shares | 7,645 |
Options Outstanding, Weighted Average Remaining Contractual Life | 1 year 306 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.58 |
Options Exercisable, Number (in shares) | shares | 7,645 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.58 |
Exercise Price 20 [Member] | |
Options Outstanding, Number (in shares) | shares | 3,077,060 |
Options Outstanding, Weighted Average Remaining Contractual Life | 6 years 233 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.66 |
Options Exercisable, Number (in shares) | shares | 3,077,060 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.66 |
Exercise Price 21 [Member] | |
Options Outstanding, Number (in shares) | shares | 900,000 |
Options Outstanding, Weighted Average Remaining Contractual Life | 5 years 142 days |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.90 |
Options Exercisable, Number (in shares) | shares | 900,000 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1.90 |
Options Outstanding, Number (in shares) | shares | 18,714,305 |
Options Outstanding, Weighted Average Remaining Contractual Life | 5 years |
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1 |
Options Exercisable, Number (in shares) | shares | 17,218,886 |
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1 |