Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Level 1		Level 2		Level 3		Total
September 30, 2013
Financial Assets:
Cash and cash equivalents	$	14,483,041	$	—	$	—	$	14,483,041
Total assets	$	14,483,041	$	—	$	—	$	14,483,041
Financial Liabilities:
Warrant derivative liabilities	$	—	$	—	$	510,363	$	510,363
Conversion element of Series B CPS		—		—		1,300,923		1,300,923
Series A CPS derivative liabilities		—		—		424,794		424,794
Total liabilities	$	—	$	—	$	2,236,080	$	2,236,080

	Level 1		Level 2		Level 3		Total
December 31, 2012
Financial Assets:
Cash and cash equivalents	$	6,328,753	$	—	$	—	$	6,328,753
Total assets	$	6,328,753	$	—	$	—	$	6,328,753
Financial Liabilities:
Warrant derivative liabilities	$	—	$	—	$	102,695	$	102,695
Conversion element of promissory notes		—		—		274,928		274,928
Conversion element of Series B CPS		—		—		1,210,909		1,210,909
Series A CPS derivative liabilities		—		—		619,652		619,652
Total liabilities	$	—	$	—	$	2,208,184	$	2,208,184

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

				Conversion
				Element of			Conversion
	Warrant			Promissory			Element of			Series A CPS
	Derivatives			Notes			Series B CPS			Derivatives			Total
Balance at January 1, 2013	$	102,695		$	274,928		$	1,210,909		$	619,652		$	2,208,184
Issuances		—			—			—			—			—
Revaluation (gains) losses included in other income and (expenses)		407,668			(274,928	)		90,014			(194,858	)		27,896
Settlements		—			—			—			—			—
Balance at September 30, 2013	$	510,363		$	—		$	1,300,923		$	424,794		$	2,236,080
Total gains (losses) included in other income and (expenses) attributable to liabilities still held as of September 30, 2013	$	(407,669	)	$	—		$	(90,014	)	$	194,858		$	(302,825	)

				Conversion
				Element of			Conversion
	Warrant			Promissory			Element of			Series A CPS
	Derivatives			Notes			Series B CPS			Derivatives			Total
Balance at January 1, 2012	$	655,219		$	1,931,295		$	1,245,101		$	2,135,715		$	5,967,330
Issuances		—			—			—			—			—
Revaluation (gains) losses included in other income and (expenses)		(221,390	)		(1,472,985	)		89,444			(572,051	)		(2,176,982	)
Settlements		—			—			—			—			—
Balance at September 30, 2012	$	433,829		$	458,310		$	1,334,545		$	1,563,664		$	3,790,348
Total gains (losses) included in other income and (expenses) attributable to liabilities still held as of September 30, 2012	$	221,390		$	1,472,985		$	(89,444	)	$	572,051		$	2,176,982