Derivative Financial Instruments (Details) (Derivative instrument liability, Warrants, Black-Scholes option pricing model, USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Range of assumptions used to determine the fair value of the warrants
Fair value of Synergy common stock (in dollars per share)	$ 2.79	$ 4.57
Expected volatility (as a percent)		60.00%
Minimum [Member]
Range of assumptions used to determine the fair value of the warrants
Expected warrant term	9 months	1 year 9 months 18 days
Risk-free interest rate (as a percent)	0.08%	0.33%
Expected volatility (as a percent)	52.00%
Maximum
Range of assumptions used to determine the fair value of the warrants
Expected warrant term	3 years 4 months 24 days	4 years 4 months 24 days
Risk-free interest rate (as a percent)	1.25%	1.39%
Expected volatility (as a percent)	60.00%