Fair Value (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Schedule of financial assets and liabilities at fair value on a recurring basis

			Quoted Prices in Active			Significant		Significant
			Markets for Identical			Other Observable		Other Unobservable
				Items		Inputs		Inputs
Balance at June 30, 2013	Total			(Level 1)		(Level 2)		(Level 3)
Common stock warrant liability	$	4,689,135		$	-	$	-	$	4,689,135

			Quoted Prices in Active			Significant		Significant
			Markets for Identical			Other Observable		Other Unobservable
				Items		Inputs		Inputs
Balance at December 31, 2012	Total			(Level 1)		(Level 2)		(Level 3)
Common stock warrant liability	$	475,825		$	-	$	-	$	475,825

Schedule of reconciliations of the beginning and ending balances for liabilities measured at fair value on a recurring basis using significant unobservable inputs (i.e. Level 3)

	Fair Value
	Measurement Using
	Significant
Common stock warrant liability	Unobservable Inputs
Beginning of period - January 1, 2013	$	475,825
Change in fair value of common stock warrants	7,964,632
Issuance of common stock warrants	2,451,028
Exercise of common stock warrants	(6,202,350)
Fair value of common stock warrant liability at June 30, 2013	$	4,689,135