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Royalty Linked Notes - Summary of Summary of Royalty-Linked Notes (Details) $ in Thousands | 6 Months Ended
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Jun. 30, 2020 USD ($)
Royalty Linked Notes [Abstract] |
Total liability related to the sale of future royalties, on inception | $ 10,990
Amortization of discount and debt issuance costs | 889
Total liability related to the sale of future royalties at June 30, 2020 | 11,879
Current portion of royalty-linked notes | 53
Royalty-linked notes, less current portion | $ 11,826

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- Definition Amortization of discount and debt issuance costs related to sale of future royalties. + References No definition available. + Details
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- Definition Liability related to the sale of future royalties. + References No definition available. + Details
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Namespace Prefix: | itrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Royalty linked notes. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
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- Definition Royalty-linked notes, current. + References No definition available. + Details
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Namespace Prefix: | itrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Royalty-linked notes noncurrent. + References No definition available. + Details
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Namespace Prefix: | itrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant