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Oxford Term Loans - Maturities of Debt (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Debt Disclosure [Abstract]
2022	$ 26,087
2023	39,130
2024	9,783
Total principal payments	75,000
Unamortized debt discounts and issuance costs	(1,492)
Long term debt, net of discounts and issuance costs	$ 73,508

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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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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.

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