Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details Textuals)

v2.4.1.9
Subsequent Events (Details Textuals)
 1 Months Ended
May 31, 2013
Jan. 29, 2015
Subsequent Event [Line Items]    
Stock Issued During Period, Shares, New Issues 7,500,000us-gaap_StockIssuedDuringPeriodSharesNewIssues  
Adjust After Closing Date [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Stock Issued During Period, Shares, New Issues   4,608,020us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ mtnb_PeriodAxis
= mtnb_AdjustAfterClosingDateMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
At Date of Acquisition [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Stock Issued During Period, Shares, New Issues   5,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ mtnb_PeriodAxis
= mtnb_AtDateOfAcquisitionMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
For Future Development [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Stock Issued During Period, Shares, New Issues   3,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ mtnb_PeriodAxis
= mtnb_ForFutureDevelopmentMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember