Stockholder's Equity and Derivative Liability - Warrants (Tables)

6 Months Ended

Jun. 30, 2018

Schedule of changes in derivative financial instruments liability balance

Date	Description	Number of Warrants Outstanding	Derivative Instrument Liability
January 1, 2018	Balance of derivative financial instruments liability	1,426,848	$	669,462
	Change in fair value of warrants for the six months ended June 30, 2018	—	(530,445		)
June 30, 2018	Balance of derivative financial instruments liability	1,426,848	$	139,017

October 13 2015

Schedule of assumptions used to measure the warrants at issuance and remeasure liability

	June 30, 2018		December 31, 2017
Price of ContraVir common stock	$ 1.30		$ 2.88
Expected warrant term (years)	2.28 years		2.78 years
Risk-free interest rate	2.63	%	2.09	%
Expected volatility	73	%	67	%
Dividend yield	—		—

April 4 2016

Schedule of assumptions used to measure the warrants at issuance and remeasure liability

	June 30, 2018		December 31, 2017
Price of ContraVir common stock	$ 1.30		$ 2.88
Expected warrant term (years)	2.76 years		3.26 years
Risk-free interest rate	2.63	%	2.09	%
Expected volatility	73	%	67	%
Dividend yield	—		—

April 25 2017

Schedule of assumptions used to measure the warrants at issuance and remeasure liability

	June 30, 2018		December 31, 2017
Price of ContraVir common stock	$ 1.30		$ 2.88
Expected warrant term (years)	3.82 years		4.31 years
Risk-free interest rate	2.62	%	2.09	%
Expected volatility	73	%	68	%
Dividend yield	—		—