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Subsequent Event (Details Textual) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified | 6 Months Ended
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Jun. 30, 2013
Proceeds from Issuance or Sale of Equity, Total | $ 50
Cantor Fitzgerald & Co [Member] |
Maximum Aggregate Offering Price Securities | $ 15
Sales Commission Percentage | 3.00%

X
- Definition Maximum offering price of the selling securities. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Percentage of gross sales per share. + References No definition available. + Details
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Namespace Prefix: | syn_
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Balance Type: | na
Period Type: | duration

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- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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