9. Stock Options and warrants (Details Narrative) (USD $)
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12 Months Ended | |
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Dec. 31, 2012
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Dec. 31, 2011
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Stock Options
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Shares available for grant | 2,750,442 | |
Amortization expense on vested options | $ 1,904,887 | $ 1,802,134 |
Aggregate intrinsic value outstanding | 19,438,106 | |
Warrant [Member]
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Amortization expense on vested options | 165,539 | 438,827 |
Aggregate intrinsic value outstanding | 28,411,354 | |
Future compensation expense on warrants not exercisable | $ 310,578 |
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- Definition
Amount of other deferred costs charged against earnings in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Future compensation expense on warrants not exercisable No definition available.
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