Derivative Financial Instruments (Details) - Derivative instrument liability - Warrants - Black-Scholes option pricing model - $ / shares	6 Months Ended
Jun. 30, 2015	Jun. 30, 2014
Range of assumptions used to determine the fair value of the warrants
Fair value of Synergy common stock (in dollars per share)	$ 8.30	$ 4.07
Expected volatility (as a percent)		60.00%
Minimum
Range of assumptions used to determine the fair value of the warrants
Expected warrant term	3 months	1 year
Risk-free interest rate (as a percent)	0.185%	0.11%
Expected volatility (as a percent)	57.00%
Maximum
Range of assumptions used to determine the fair value of the warrants
Expected warrant term	2 years 10 months 24 days	3 years 8 months 12 days
Risk-free interest rate (as a percent)	1.01%	1.32%
Expected volatility (as a percent)	80.00%

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

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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

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