XML 32 R20.htm IDEA: XBRL DOCUMENT
v3.19.2

Notes Payable (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2019
Notes Payable. |
Schedule of notes payable |
|  | June 30, |  | December 31, |  |  |  |
($ in thousands) |  | 2019 |  | 2018 |  | Interest Rate |  | Maturity
Horizon Notes (1) |  | $ | 15,750 |  | $ | — |  | 9.00 | % | October - 2022
Less: Discount on notes payable |  |  | 2,799 |  |  | — |  |  |  |
Total notes payable |  | $ | 12,951 |  | $ | — |  |  |  |
(1) Balance includes $0.75 million final payment fee

X
- Definition The entire disclosure for notes payable. + References No definition available. + Details
Name: | mbio_NotesPayableDisclosureTableTextBlock
Namespace Prefix: | mbio_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration