Liability Attributable to Warrants (Tables)

12 Months Ended

Dec. 31, 2016

Other Liabilities Disclosure [Abstract]

Fair Value, Assets and Liabilities Measured On Nonrecurring Basis, Valuation Techniques

We used a binomial pricing model to determine the fair value of our warrants liability as of December 31, 2016 and 2015, the balance sheet dates, respectively, using the following assumptions:

For the Year Ended December 31, 2016

Warrants	Estimated Volatility	Annualized Forfeiture Rate	Expected Option Term (Years)	Estimated Exercise Factor	Risk-Free Interest Rate	Dividends
2011 Private Placement	108% - 162%	—	0.6 - 0	-3.5 – 1.1	-0.20% - 0.26-%	—
ipCapital	125% - 378%	—	0.71 - 0-	-4.0 – 1.1	-0.20% - 0.26-%	—

For the Year Ended December 31, 2015

Warrants	Estimated Volatility	Annualized Forfeiture Rate	Expected Option Term (Years)	Estimated Exercise Factor	Risk-Free Interest Rate	Dividends
2011 Private Placement	104% - 132	—	1.61 – 0.68	3.5	0.26% - 0.47%	—
ipCapital	105% - 127%	—	1.79 – 0.79	4	0.26% - 0.54%	—

Fair Value, Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation

The following table is a reconciliation of the warrants liability measured at fair value using significant unobservable inputs (Level 3) for the year ended December 31, 2016:

Warrants liability – December 31, 2015 fair value	$	31,600
Change in fair value of warrant liability recorded in other income		(29,300	)
Change in fair value of warrant liability recorded in general and administrative expense		(2,300	)
Warrants liability – December 31, 2016 fair value	$	-

Schedule of Stockholders' Equity Note, Warrants or Rights

The following tables reconcile the number of warrants outstanding for the periods indicated:

	For the Year Ended December 31, 2016
	Beginning Outstanding		Issued		Exercised		Cancelled / Forfeited		Ending Outstanding
2011 Transaction		686,833		—				(686,833)		—
2014 Transaction		376,667		—		—		—		376,667
ipCapital		26,667		—		—		(26,667)		—
Exercise Agreement		300,000		—		—		—		300,000
Consultant Warrant		11,285		—		—		—		11,285
Offer to Exercise		10,167		—		—		—		10,167
		1,411,619		—		—		—		698,119

	For the Year Ended December 31, 2015
	Beginning Outstanding		Issued		Exercised		Cancelled / Forfeited		Ending Outstanding
2011 Transaction		686,833		—		—		—		686,833
2014 Transaction		376,667		—		—		—		376,667
ipCapital		26,667		—		—		—		26,667
Exercise Agreement		300,000		—		—		—		300,000
Consultant Warrant (1)		11,285		—		—		—		11,285
Offer to Exercise		10,167		—		—		—		10,167
		1,411,619		—		—		—		1,411,619