5. Stock options and warrants (Details 1) (Option [Member], USD $)
|
6 Months Ended | |
---|---|---|
Jun. 30, 2013
|
Dec. 31, 2012
|
|
Outstanding Options | ||
Shares | 27,248,098 | 27,278,098 |
Life (Years) | 7 years 7 months 6 days | |
Weighted Average Exercise Price | $ 0.27 | $ 0.27 |
Exercisable Options | ||
Shares | 5,648,098 | |
Weighted Average Exercise Price | $ 0.34 | |
$ 0.25 - $ 0.99 [Member]
|
||
Outstanding Options | ||
Shares | 27,166,679 | |
Life (Years) | 7 years 7 months 6 days | |
Weighted Average Exercise Price | $ 0.27 | |
Exercisable Options | ||
Shares | 5,566,679 | |
Weighted Average Exercise Price | $ 0.32 | |
$ 1.00 - $ 1.99 [Member]
|
||
Outstanding Options | ||
Shares | 81,419 | |
Life (Years) | 2 years 3 months 18 days | |
Weighted Average Exercise Price | $ 1.36 | |
Exercisable Options | ||
Shares | 81,419 | |
Weighted Average Exercise Price | $ 1.26 |