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Long-term Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Convertible senior notes
Debt Instrument [Line Items]
Issuance Discount	$ (15,299)	$ (17,068)
Deferred Financing Costs	(2,586)	(2,857)
Net Carrying Value	$ 186,115	$ 184,075
Convertible senior notes | Initial Notes, due January 16, 2022
Debt Instrument [Line Items]
Stated Interest Rate	12.00%	12.00%
Effective Interest Rate	18.80%	18.80%
Issuance Discount	$ (13,185)	$ (14,703)
Deferred Financing Costs	(2,448)	(2,706)
Net Carrying Value	$ 137,867	$ 136,091
Convertible senior notes | Option Notes, due January 16, 2022
Debt Instrument [Line Items]
Stated Interest Rate	12.00%	12.00%
Effective Interest Rate	14.90%	14.90%
Issuance Discount	$ (2,114)	$ (2,365)
Deferred Financing Costs	(138)	(151)
Net Carrying Value	$ 48,248	$ 47,984
Secured Term Note | Secured Term Note
Debt Instrument [Line Items]
Stated Interest Rate	9.75%	9.75%
Effective Interest Rate	12.80%	12.20%
Deferred Financing Costs	$ (590)	$ (537)
Net Carrying Value	$ 12,410	$ 12,463

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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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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