Debt (Tables)

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Schedule of Long-term Debt

The following table summarizes borrowings under this facility as of the period presented:

Lender	Borrowing Capacity as of September 30, 2019		Borrowings as of September 30, 2019
Goldman Sachs Bank USA	$	100,000	$	—

The following table summarizes borrowings under these facilities as of the periods presented:

Lender	Borrowing Capacity as of September 30, 2019		Borrowings as of September 30, 2019		Borrowings as of December 31, 2018
Western Alliance Bank	$	24,500	$	11,522	$	1,141
Texas Capital Bank, N.A.	24,500		10,465		3,592
Total	$	49,000	$	21,987	$	4,733

The Notes consisted of the following:

	September 30, 2019			December 31, 2018
Principal	$	143,750		$	143,750
Less: debt discount, net of amortization	(22,605		)	(26,636		)
Less: debt issuance costs, net of amortization	(2,987		)	(3,528		)
Net carrying amount of the Notes	$	118,158		$	113,586

Interest Income and Interest Expense Disclosure

The following table sets forth total interest expense recognized related to the Notes for the periods presented:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Amortization of debt discount	$	1,359	$	997	$	4,031	$	997
Amortization of debt issuance costs	182		131		541		131
Total amortization of debt issuance costs and accretion of equity portion	1,541		1,128		4,572		1,128
Contractual interest expense	629		482		1,887		482
Total interest expense related to the Notes	$	2,170	$	1,610	$	6,459	$	1,610