Derivative Financial Instruments (Details) (USD $)	0 Months Ended	12 Months Ended
Nov. 30, 2011	Dec. 31, 2012	Dec. 31, 2011
Range of assumptions used to determine the fair value of the warrants
Reverse stock split ratio	0.5
Derivative instrument liability \| Warrants \| Black-Scholes option pricing 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%	0.00%
Derivative instrument liability \| Warrants \| Black-Scholes option pricing model \| Minimum
Range of assumptions used to determine the fair value of the warrants
Fair value of Synergy common stock (in dollars per share)		4.05	3.50
Expected warrant term		5 years	4 years
Risk-free interest rate (as a percent)		0.23%	0.36%
Expected volatility (as a percent)			70.00%
Derivative instrument liability \| Warrants \| Black-Scholes option pricing model \| Maximum
Range of assumptions used to determine the fair value of the warrants
Fair value of Synergy common stock (in dollars per share)		5.26	9.04
Expected warrant term		7 years	7 years
Risk-free interest rate (as a percent)		1.33%	2.22%
Expected volatility (as a percent)			90.00%
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%	0.00%
Reverse stock split ratio	0.5
Derivative instrument liability \| Warrants \| Binomial model \| Minimum
Range of assumptions used to determine the fair value of the warrants
Fair value of Synergy common stock (in dollars per share)		3.28	2.71
Expected warrant term		4 years 1 month 17 days	5 years
Risk-free interest rate (as a percent)		0.62%	0.90%
Expected volatility (as a percent)			70.00%
Derivative instrument liability \| Warrants \| Binomial model \| Maximum
Range of assumptions used to determine the fair value of the warrants
Fair value of Synergy common stock (in dollars per share)		4.53	5.02
Expected warrant term		4 years 7 months 17 days	7 years
Risk-free interest rate (as a percent)		1.04%	2.64%
Expected volatility (as a percent)			90.00%

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=7578670&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

+ Details

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Namespace Prefix:	us-gaap_
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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

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- Definition

This item represents the conversion ratio used in the calculation of a stock split.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Stock Split

-URI http://asc.fasb.org/extlink&oid=6525746

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 4

-Subparagraph (SAB TOPIC 4.C)

-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187143-122770

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