11. Net Loss Per Common Share Data (Tables)

12 Months Ended

Dec. 31, 2012

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

	Year Ended December 31,
	2012			2011
Net loss	$	(9,820,625	)	$	(9,053,764	)
Deemed preferred stock redemption		—			(6,906,566	)
Net loss attributable to common stockholders	$	(9,820,625	)	$	(15,960,330	)
Denominator:
Weighted-average common shares outstanding		7,998,662			2,164,232
Basic and diluted net loss per common share	$	(1.23	)	$	(7.37	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Year Ended December 31,
	2012		2011
Options to purchase common stock		625,000		2,101,774
Warrants		1,981,661		2,219,546
Restricted stock		122,666		191,166