Related-Party Arrangements (Tables)

12 Months Ended

Dec. 31, 2018

Schedule of Related Party Debt

	December 31, 2018			December 31, 2017
Principal amount	$	71,506		$	79,666
Unamortized premium		639			—
Unaccreted debt issuance costs		(56	)		—
Net carrying amount	$	72,089		$	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 years ended December 31, 2018 and 2017 are as follows (in thousands):

	For the Year Ended December 31,
	2018		2017
Interest expense on note payable to related party	$	4,304	$	3,782

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 notes for the years ended December 31, 2018, 2017 and 2016 are as follows (in thousands):

	December 31,
	2018		2017		2016
Amortization of debt premium	$	154	$	232		234
Accretion expense - debt issuance cost	$	4	$	227		257

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 years ended December 31, 2018 and 2017 are as follows (in thousands):

	For the Year Ended December 31,
	2018		2017
Amortization of debt premium	$	185	$	—
Accretion expense - debt issuance cost	$	19	$	—