Long-term Debt - Summary of Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Note payable	$ 9,974
Capital lease obligations	350	$ 1,234
Total debt	119,546	91,042
Current portion of long-term debt	(112,401)	(7,837)
Total long-term debt	7,145	83,205
Credit Facility
Debt Instrument [Line Items]
Principal outstanding	35,000	12,334
Unamortized debt issuance costs	(205)	(125)
Carrying amount	34,795	12,209
Senior Loan Facility
Debt Instrument [Line Items]
Principal outstanding	29,000	29,000
Unamortized debt issuance costs	(1,232)	(2,448)
Carrying amount	27,768	26,552
6% Convertible Notes Due 2023
Debt Instrument [Line Items]
Principal outstanding	60,000	60,000
Unamortized debt issuance costs	(300)
Unamortized debt discount and debt issuance costs	(13,341)	(15,906)
Carrying amount	$ 46,659	44,094
10% senior notes due 2019
Debt Instrument [Line Items]
Principal outstanding		6,957
Unamortized debt issuance costs		(4)
Carrying amount		$ 6,953

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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