Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

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

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.

+ References

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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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Derivative Financial Instruments (Details) (USD $)	12 Months Ended
Derivative Financial Instruments (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 17, 2012
Range of assumptions used to determine the fair value of the warrants
Estimated fair value of Synergy common stock (in dollars per share)				$ 4.57us-gaap_SharePrice
Derivative instrument liability \| Warrants \| Black-Scholes option pricing model
Range of assumptions used to determine the fair value of the warrants
Estimated fair value of Synergy common stock (in dollars per share)	$ 3.05	$ 5.55
Expected volatility (as a percent)		60.00%
Dividend yield (as a percent)	0.00%	0.00%
Derivative instrument liability \| Warrants \| Black-Scholes option pricing model \| Minimum
Range of assumptions used to determine the fair value of the warrants
Expected warrant term	5 months 27 days	1 year 9 months 18 days
Risk-free interest rate (as a percent)	0.08%	0.26%
Expected volatility (as a percent)	52.00%
Derivative instrument liability \| Warrants \| Black-Scholes option pricing model \| Maximum
Range of assumptions used to determine the fair value of the warrants
Expected warrant term	3 years 10 months 24 days	4 years 4 months 24 days
Risk-free interest rate (as a percent)	1.32%	1.76%
Expected volatility (as a percent)	60.00%
Derivative instrument liability \| Warrants \| Binomial model
Range of assumptions used to determine the fair value of the warrants
Expected volatility (as a percent)			60.00%
Dividend yield (as a percent)			0.00%
Derivative instrument liability \| Warrants \| Binomial model \| Minimum
Range of assumptions used to determine the fair value of the warrants
Estimated fair value of Synergy common stock (in dollars per share)			3.28
Expected warrant term			4 years 1 month 17 days
Risk-free interest rate (as a percent)			0.62%
Derivative instrument liability \| Warrants \| Binomial model \| Maximum
Range of assumptions used to determine the fair value of the warrants
Estimated fair value of Synergy common stock (in dollars per share)			4.53
Expected warrant term			4 years 7 months 17 days
Risk-free interest rate (as a percent)			1.04%