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Convertible Preferred Stock (Tables)

6 Months Ended

Jun. 30, 2012

Convertible Preferred Stock [Abstract]

Preferred stock and warrants calculated using the Black Scholes Merton pricing model

This amount was allocated to the preferred stock and warrants based on their related fair values. The fair value of the warrants was calculated using the Black Scholes-Merton pricing model using the following assumptions:

Number of warrants			125,000				200,000
Exercise price		$	6.00			$	7.00
Expected volatility of underlying stock			74	%			74	%
Risk-free interest rate			1.50	%			1.70	%
Dividend yield			0.00	%			0.00	%
Expected life of warrants			8 years				8 years
Weighted-average fair value of warrants		$	3.17			$	3.07
Expiration date			May 2, 2020				May 2, 2020

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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