Net Loss Per Share of Common Stock (Tables)

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table reconciles the numerator and denominator for the calculation.

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
	2013			2012			2013			2012
Basic and diluted net loss per share:
Numerator:
Net loss	$	(1,179,465	)	$	(4,226,515	)	$	(3,998,558	)	$	(10,538,593	)
Preferred stock cash dividends		—			—			—			(192,848	)
Numerator for basic and diluted earnings per share
Net loss attributable to common stockholders	$	(1,179,465	)	$	(4,226,515	)	$	(3,998,558	)	$	(10,731,441	)
Denominator:
Weighted average basic and diluted shares outstanding		33,892,790			32,848,076			33,654,044			32,648,487
Basic and diluted net loss per share:
Net loss	$	(0.03	)	$	(0.13	)	$	(0.12	)	$	(0.32	)
Preferred stock cash dividends		—			—			—			(0.01	)
Net loss attributable to common stockholders	$	(0.03	)	$	(0.13	)	$	(0.12	)	$	(0.33	)