Note 11

(b) Warrants

The Company accounts for warrants that have provisions that protect holders from a decline in the issue price of its common stock (or “down-round” provisions) or that contain net settlement provision as liabilities instead of equity. Down-round provisions reduce the exercise or conversion price of a warrant or convertible instrument if a company either issues equity shares for a price that is lower than the exercise or conversion price of those instruments or issues new warrants or convertible instruments that have a lower exercise or conversion price. Net settlement provisions allow the holder of the warrant to surrender shares underlying the warrant equal to the exercise price as payment of its exercise price, instead of physically exercising the warrant by paying cash. The Company evaluated whether warrants to acquire its common stock contain provisions that protect holders from declines in the stock price or otherwise could result in modification of the exercise price and/or shares to be issued under the respective warrant agreements based on a variable that is not an input to the fair value of a “fixed-for-fixed” option.

The warrants issued to the Investor, in conjunction with the original $18 million convertible note (see Note 10, Convertible Debt), contain a down-round provision. The Company concluded that the triggering event of the down-round provision was not based on an input to the fair value of “fixed-for-fixed” option and therefore is not considered indexed to the Company's stock. The warrant contains a net settlement provision, and because it is not indexed to the Company's stock, it is accounted for as a liability.

The Company recognizes these warrants as a liability at the fair value on each reporting date. The Company measured the fair value of these warrants as of June 30, 2011, and recorded other expense of $1,026,888 resulting from the increase of the liability associated with the fair value of the warrants for the three month period and recorded other expense of $1,310,410 resulting from the increase of the liability associated with the fair value of the warrants for the six months ended June 30, 2011, respectively. The Company measured the fair value of these warrants as of June 30, 2010, and recorded other income of $833,425 resulting from the decrease of the liability associated with the fair value of the warrants for the three month period and recorded other expense of $97,956 resulting from the increase of the liability associated with the fair value of the warrants for the six months ended June 30, 2010, respectively. The Company has accounted for the Investor's warrants as a liability due to the “down-round” price protection provision. See Note 1, Fair Value Measurements. The Company computed the value of the warrants using the Black-Scholes method. The following are the key assumptions used to value the warrants as of the dates indicated:

	June 30, 2011			December 31, 2010			June 30, 2010
	(unaudited)						(unaudited)
Number of shares underlying warrants		301,288			293,610			293,610
Exercise price	$	17.92		$	18.39		$	18.39
Fair value of warrants	$	2,249,033		$	938,623		$	839,481
Volatility		85.49	%		83.04	%		82.96	%
Risk-free interest rate		1.76	%		2.71	%		2.42	%
Expected dividend yield		0	%		0	%		0	%
Expected warrant life	5.67 years			6.17 years			6.67 years

The Company's recurring fair value measurements at June 30, 2011 related only to the warrants issued to the Investor, and had a fair value of $2,249,033. The inputs used in measuring the fair value of these warrants are of Level 3, significant unobservable inputs.

No other warrants issued by the Company contain both down-round provisions and net settlement provisions.

Recurring Level 3 Activity and Reconciliation

The table below provides a reconciliation of the beginning and ending balances for the liability measured at fair value using significant unobservable inputs (Level 3). The table reflects gains and losses for the six months for all financial liabilities categorized as Level 3 as of June 30, 2011 and December 31, 2010.

Fair Value Measurements Using Significant Unobservable Inputs (Level 3):

Warrant liability:
Balance as of December 31, 2009	$	741,525
Increase in fair value of warrants		197,098
Balance as of December 31, 2010		938,623
Increase in fair value of warrants		1,310,410
Balance as of June 30, 2011	$	2,249,033