5. Stock options and warrants (Details 3) (USD $)
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3 Months Ended | 3 Months Ended | ||||
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Mar. 31, 2013
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Mar. 31, 2012
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Mar. 31, 2013
Warrant [Member]
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Dec. 31, 2012
Warrant [Member]
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Mar. 31, 2013
Warrant [Member]
$ 0.21 - $ 0.99 [Member]
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Mar. 31, 2013
Warrant [Member]
$1.00 - $1.99 [Member]
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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 |
X | ||||||||||
- Definition
The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Details
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X | ||||||||||
- Details
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