Related-Party Arrangements (Tables)

9 Months Ended

Sep. 30, 2018

Schedule of Related Party Debt

Related party debt consist of the following (in thousands):

	September 30, 2018			December 31, 2017
Principal amount	$	71,506		$	79,666
Unamortized premium		699			—
Unaccreted debt issuance costs		(62	)		—
Net carrying amount	$	72,143		$	79,666

Schedule of Interest Expense on Note Payable to Related Party

Interest expense (excluding the amortization of debt premium and debt issuance costs) for the three and nine months ended September 30, 2018 and 2017 are as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Interest expense on note payable to related party	$	1,074	$	1,173	$	3,234	$	2,608

Schedule of Amortization of Premium and Accretion of Debt Issuance Costs

Amortization of the premium and accretion of debt issuance costs related to the 2021 and 2018 notes for the three and nine months ended September 30, 2018 and 2017 are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Amortization of debt premium	$	35	$	62	$	119	$	182
Accretion expense - debt issuance cost		2	$	70	$	2	$	204

Related Party Notes

Schedule of Amortization of Premium and Accretion of Debt Issuance Costs

Amortization of the premium and accretion of debt issuance costs related to the related party notes for the three and nine months ended September 30, 2018 and 2017 are as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Amortization of debt premium	$	59	$	—	$	125	$	—
Accretion expense - debt issuance cost	$	6	$	—	$	13	$	—