Net Loss Per Share

12 Months Ended

Dec. 31, 2012

Net Loss Per Share [Abstract]

Net Loss Per Share

14. Net Loss per Share

The following is a reconciliation of the numerator (net loss) and the denominator (number of shares) used in the basic and diluted earnings per share calculations:

	Year Ended December 31,
	2012		2011		2010
Numerator:
Numerator for basic EPS	$	(9,238,427)	$	(32,031,175)	$	(19,923,487)
Effect of dilutive securities:		—		—		—
Numerator for diluted EPS	$	(9,238,427)	$	(32,031,175)	$	(19,923,487)
Denominator:
Denominator for basic EPS—weighted average shares		6,944,928		5,482,627		5,052,200
Effect of dilutive securities:		—		—		—
Denominator for diluted EPS		6,944,928		5,482,627		5,052,200
Basic EPS	$	(1.33)	$	(5.84)	$	(3.94)
Diluted EPS	$	(1.33)	$	(5.84)	$	(3.94)

The following table sets forth the number of common shares that were excluded from the computation of diluted earnings per share because their inclusion would have been anti-dilutive as follows:

	December 31,
	2012		2011		2010
Shares outstanding
Restricted shares		68,543		52,659		3,328
Shares issuable upon vesting/exercise of:
Options to purchase common stock		373,899		562,733		471,108
Restricted stock units		529,312		98,820		—
Warrants		6,099,476		1,038,161		1,038,161
		7,071,230		1,752,374		1,512,598