Debt (Tables)

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Components of Debt

Debt consisted of the following balances as of the dates indicated (in thousands):

	March 31, 2018				December 31, 2017
	Principal		Carrying Amount		Principal		Carrying Amount
2017 Senior Credit Facility	$	—	$	—	$	16,723	$	16,723
Convertible Second Lien Notes (1)	48,602		41,464		47,015		39,002
Total debt	$	48,602	$	41,464	$	63,738	$	55,725

(1) The debt discount is being amortized using the effective interest rate method based upon a maturity date of August 30, 2019. The principal includes $8.6 million and $7.0 million of paid in-kind interest at March 31, 2018 and December 31, 2017, respectively. The carrying value includes $7.1 million and $8.0 million of unamortized debt discount at March 31, 2018 and December 31, 2017, respectively.

Schedule of Interest Expense and Effective Interest

The following table summarizes the total interest expense for the periods shown including contractual interest expense, amortization of debt discount, accretion and financing costs and the effective interest rate on the liability component of the debt (amounts in thousands, except effective interest rates):

	Three Months Ended March 31, 2018				Three Months Ended March 31, 2017
	Interest Expense		Effective Interest Rate		Interest Expense		Effective Interest Rate
2017 Senior Credit Facility	$	173	6.3	%	$	—	—%
Exit Credit Facility	—		—	%	252		6.1%
Convertible Second Lien Notes (1)	2,500		24.6	%	1,927		24.2%
Total interest expense	$	2,673			$	2,179

(1) Interest expense for the three months ended March 31, 2018 included $0.9 million of debt discount amortization and $1.6 million of paid in-kind interest, and interest expense for the three months ended March 31, 2017 included $0.5 million of debt discount amortization and $1.4 million of paid in-kind interest.