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Consolidated Statements of Equity (Parenthetical) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
Stock Issuance Cost | $ 1,031 | $ 680

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- Definition Stock Issuance Cost during the period. + References No definition available. + Details
Name: | syn_StockIssuanceCost
Namespace Prefix: | syn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration