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Accrued expenses and other current liabilities (Details) (USD $)
Dec. 31, 2014
Payables and Accruals [Abstract]  
Research and development costs $ 125,067flks_AccruedResearchAndDevelopmentExpenseCurrent
Deferred IPO issuance costs 175,149flks_DeferredIPOIssuanceCostCurrent
Payroll and employee-related costs 34,218us-gaap_EmployeeRelatedLiabilitiesCurrent
Consumer brand-related costs 23,635us-gaap_AccruedMarketingCostsCurrent
Professional fees 15,500us-gaap_AccruedProfessionalFeesCurrent
Other 42,955us-gaap_OtherAccruedLiabilitiesCurrent
Total $ 416,524flks_AccruedExpensesAndOtherCurrentLiabilities