|
Note 13 - Stock Option and Incentive Plan (Details) - Options outstanding at December 31, 2013 are summarized as follows: (USD $)
|
12 Months Ended |
|
Dec. 31, 2013
|
|
Range 1 [Member]
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Exercise Price Range - Lower Limit |
$ 0.03 |
| Exercise Price Range - Upper Limit |
$ 0.11 |
| Number Outstanding - Options (in Shares) |
6,412,500 |
| Weighted-Average Remaining Contractual Life - Options |
4 years 328 days |
| Weighted-Average Exercise Price - Options |
$ 0.03 |
| Number Outstanding - Vested (in Shares) |
2,145,750 |
| Weighted-Average Exercise Price - Vested |
$ 0.03 |
|
Range 2 [Member]
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Exercise Price Range - Lower Limit |
$ 0.40 |
| Exercise Price Range - Upper Limit |
$ 0.75 |
| Number Outstanding - Options (in Shares) |
41,495 |
| Weighted-Average Remaining Contractual Life - Options |
3 years |
| Weighted-Average Exercise Price - Options |
$ 0.63 |
| Number Outstanding - Vested (in Shares) |
41,495 |
| Weighted-Average Exercise Price - Vested |
$ 0.63 |
|
Range 3 [Member]
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Exercise Price Range - Lower Limit |
$ 1.92 |
| Exercise Price Range - Upper Limit |
$ 3.48 |
| Number Outstanding - Options (in Shares) |
124,238 |
| Weighted-Average Remaining Contractual Life - Options |
2 years |
| Weighted-Average Exercise Price - Options |
$ 2.41 |
| Number Outstanding - Vested (in Shares) |
103,405 |
| Weighted-Average Exercise Price - Vested |
$ 2.46 |
|
Range 4 [Member]
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Exercise Price Range - Lower Limit |
$ 4.00 |
| Exercise Price Range - Upper Limit |
$ 7.40 |
| Number Outstanding - Options (in Shares) |
40,000 |
| Weighted-Average Remaining Contractual Life - Options |
219 days |
| Weighted-Average Exercise Price - Options |
$ 5.15 |
| Number Outstanding - Vested (in Shares) |
40,000 |
| Weighted-Average Exercise Price - Vested |
$ 5.15 |
|
Range 5 [Member]
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Exercise Price Range - Lower Limit |
$ 0.03 |
| Exercise Price Range - Upper Limit |
$ 7.40 |
| Number Outstanding - Options (in Shares) |
6,618,233 |
| Weighted-Average Remaining Contractual Life - Options |
4 years 292 days |
| Weighted-Average Exercise Price - Options |
$ 0.11 |
| Number Outstanding - Vested (in Shares) |
2,330,650 |
| Weighted-Average Exercise Price - Vested |
$ 0.24 |