Derivative Financial Instruments (Details 5) (USD $)	0 Months Ended					0 Months Ended
	Feb. 18, 2014	Mar. 31, 2014	Dec. 31, 2013	Feb. 18, 2014 Weighted average	Dec. 31, 2013 Weighted average	Feb. 18, 2014 ContraVir Subsidiary	Jan. 28, 2014 ContraVir Subsidiary
Derivative Financial Instruments
Shares of subsidiary to be distributed for each share of the entity's shares outstanding							0.0986
ContraVir shares distributed for each Synergy common stock share held						0.0986
Decrease in exercise price (in dollars per share)	$ 0.011
Warrants outstanding (in shares)		5,647,203	5,647,203
Exercise price of warrants (in dollars per share)				$ 5.359	$ 5.37