Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Textual)

Income Taxes (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Income Taxes [Line Items]    
Deferred Tax Assets, Valuation Allowance $ 5,227,767us-gaap_DeferredTaxAssetsValuationAllowance $ 1,482,668us-gaap_DeferredTaxAssetsValuationAllowance
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 3,700,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount  
Income Tax Expense (Benefit) 270,000us-gaap_IncomeTaxExpenseBenefit  
Income Tax Examination, Likelihood of Unfavorable Settlement 50percentage points over a three-year period  
State and Local Jurisdiction [Member]    
Income Taxes [Line Items]    
Tax Credit Carryforward, Amount 241,000us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
Federal Tax Authority [Member]    
Income Taxes [Line Items]    
Operating Loss Carryforwards $ 11,300,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= mtnb_FederalTaxAuthorityMember
Third Party [Member]    
Income Taxes [Line Items]    
Tax Credit Carryforward Year of Expiration 2033