Debt - Schedule of long term debt (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt
Long‑term debt with related party	$ 30,827	$ 30,243
OrbiMed Term Loans (related party)
Debt
Long Term Debt	30,000	30,000
End of term charge	3,000	3,000
Unamortized end of term charge and issuance costs	(2,173)	(2,757)
Long‑term debt with related party	$ 30,827	$ 30,243

Face (par) amount of debt instrument at time of issuance.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

+ References

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- Definition

Amount, after accumulated amortization, of debt premium.

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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