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4syn_IssuanceOfWarrantsToPurchaseOfCommonStocksyn_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse635855635855falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesWarrants issued to purchase common stock.No definition available.false1Issuance of Warrants to Purchase of Common Stock2false 4syn_WarrantsExercisePricePerSharesyn_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse1.601.60USD$falsetruefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalsenum:perShareItemTypedecimalper share amount of the warrant.No definition 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4syn_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsExercisableNumbersyn_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse250000250000falsefalsefalse4truefalsefalse100000100000falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesThe number of exercisable share warrants that may be converted as of the balance sheet date.No definition available.false1Share-based Compensation Arrangement by Share-based Payment Award, Warrants, Exercisable Number6false 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