Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation (Details1)

v2.4.1.9
Stock Based Compensation (Details1) (2013 Equity Compensation Plan)
12 Months Ended
Dec. 31, 2014
2013 Equity Compensation Plan
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Awards Reserved for Issuance 8,250,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= mtnb_TwoThousandThirteenEquityCompensationPlanMember
Awards Issued 5,646,067us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
/ us-gaap_AwardTypeAxis
= mtnb_TwoThousandThirteenEquityCompensationPlanMember
[1]
Awards Available for Grant 2,603,933us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= mtnb_TwoThousandThirteenEquityCompensationPlanMember
[1] includes both stock grants and option grants