Derivative Financial Instruments (Details) (Derivative instrument liability, Warrants, Black-Scholes option pricing model, USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Range of assumptions used to determine the fair value of the warrants
Fair value of Synergy common stock (in dollars per share)	$ 4.62us-gaap_SharePrice	$ 5.31us-gaap_SharePrice
Expected volatility (as a percent)	57.00%	60.00%
Minimum
Range of assumptions used to determine the fair value of the warrants
Expected warrant term	3 months	1 year 3 months
Risk-free interest rate (as a percent)	0.03%	0.13%
Maximum
Range of assumptions used to determine the fair value of the warrants
Expected warrant term	2 years 10 months 24 days	3 years 10 months 24 days
Risk-free interest rate (as a percent)	0.89%	1.32%

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

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- Definition

Risk-free interest rate assumption used in valuing an instrument.

+ References

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

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