Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2016

Stockholders' Equity Note [Abstract]

Summary of preferred stock authorized, issued and outstanding

The following is a summary of the Company's authorized and issued common and preferred stock as of June 30, 2016 and December 31, 2015:

			Outstanding as of
	Authorized	Issued	June 30, 2016	December 31, 2015
Common Stock, par $0.001	600,000,000	73,482,859	73,482,859	72,217,965
Series A Preferred Stock, par $0.001	1,000	817	—	—
Series B Preferred Stock, par $0.001	1,000	750	—	—
Series C Preferred Stock, par $0.001	1,091	1,091	23	23
Series D Preferred Stock, par $0.001	1,966,292	1,966,292	—	—

Summary of warrants outstanding

The following table summarizes the warrants outstanding as of June 30, 2016 and December 31, 2015:

				As of June 30, 2016			As of December 31, 2015
Issued in Connection With:	Exercise Price		Expiration Date	Number of Warrants	Common Stock Warrant Liability		Number of Warrants	Common Stock Warrant Liability
March 2013 financing	$	3.17	September 12, 2018	284,091	$	1,815,343	284,091	$	1,301,138
Warrants assumed in June 2009 Merger	$4.08-$5.08		April 28, 2016	—	—		276,813	—
Total				284,091	$	1,815,343	560,904	$	1,301,138