5. Stock options and warrants (Details Narrative) (USD $)
|
3 Months Ended | 3 Months Ended | |||
---|---|---|---|---|---|
Mar. 31, 2013
Option [Member]
|
Dec. 31, 2012
Warrant [Member]
|
Mar. 31, 2013
Warrant [Member]
Employee [Member]
|
Mar. 31, 2013
Warrant [Member]
Consultant [Member]
|
Mar. 31, 2013
2004 Stock Option Plan [Member]
|
|
Shares available to be granted under 2004 Stock Option Plan | 2,750,442 | ||||
Amortization expense | $ 404,587 | $ 24,310 | $ 23,251 | ||
Future unamortized compensation expense | $ 4,727,826 | $ 226,893 |