Long-term Debt (Details) - OrbiMed Term Loans (related party) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Long-term Debt
OrbiMed Term Loan (related party)	$ 30,000	$ 30,000
End of term charge	3,000	3,000
Unamortized issuance costs	(2,892)	(3,267)
Long-term debt	$ 30,108	$ 29,733

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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- Definition

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.

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No definition available.

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- Definition

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

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Amount, after accumulated amortization, of debt premium.

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