The following selected pro forma balance sheet data is derived from our balance sheet as of September 30, 2012 and gives retroactive effect to the completion of the underwritten offering, but does not give effect to other events that occurred since September 30, 2012 and thus may not be indicative of our current financial condition. The information should be read in conjunction with our balance sheet as of September 30, 2012 and related notes.

	Actual as of September 30, 2012			Adjustments Related to October 2012 Financing		Pro Forma as of September 30, 2012
	(Unaudited)			(Unaudited)		(Unaudited)
ASSETS

Current assets:
Cash and cash equivalents	$	12,453,637		$	21,400,000	$	33,853,637
Short-term investments		10,000,000			—		10,000,000
Prepaid and other current assets		1,308,588			—		1,308,588
Total current assets		23,762,225			21,400,000		45,162,225
Non-current assets		596,565			—		596,565
Total assets	$	24,358,790		$	21,400,000	$	45,758,790

LIABILITIES AND STOCKHOLDERS' EQUITY

Total current liabilities	$	20,601,016		$		$	20,601,016


Stockholders' equity:
Preferred Stock, $0.01 par value, 5,000,000 shares authorized, including 25,000 shares of Series A Junior Participating Preferred Stock; no shares issued and outstanding		—			—		—
Common stock, $0.001 par value, 250,000,000 shares authorized; 21,307,916 shares issued at September 30, 2012		21,308			9,200		30,508
Additional paid-in-capital		238,769,155			21,390,800		260,159,955
Treasury stock, at cost (90,546 shares)		(2,279,238	)		—		(2,279,238	)
Accumulated deficit		(232,753,451	)		—		(232,753,451	)
Total stockholders' equity		3,757,774			21,400,000		25,157,774
Total liabilities and stockholders' equity	$	24,358,790		$	21,400,000	$	45,758,790