Quarterly report pursuant to sections 13 or 15(d)

5. Stock options and warrants (Details 3)

v2.4.0.6
5. Stock options and warrants (Details 3) (USD $)
3 Months Ended 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Warrant [Member]
Dec. 31, 2012
Warrant [Member]
Mar. 31, 2013
Warrant [Member]
$ 0.21 - $ 0.99 [Member]
Mar. 31, 2013
Warrant [Member]
$1.00 - $1.99 [Member]
Outstanding Warrants            
Shares 17,198,598 28,049,558 27,052,184 42,205,507 26,552,184 500,000
Life (Years)     1 year 9 months 18 days   1 year 9 months 18 days 1 year 3 months 18 days
Weighted Average Exercise Price     $ 0.32 $ 0.31 $ 0.30 $ 1.00
Exercisable Warrants            
Shares     25,685,517   25,185,517 500,000
Weighted Average Exercise Price     $ 0.32   $ 0.30 $ 1.00