Debt - (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

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

Lender	Borrowing Capacity as of December 31, 2019		Borrowings as of December 31, 2019
Goldman Sachs Bank USA	$	100,000	$	4,444

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

Lender	Borrowing Capacity as of December 31, 2019		Borrowings as of December 31, 2019		Borrowings as of December 31, 2018
Western Alliance Bank	$	24,500	$	8,489	$	1,141
Texas Capital Bank, N.A.	24,500		10,210		3,592
Flagstar Bank, FSB	15,000		2,603		N/A
Total	$	64,000	$	21,302	$	4,733

Convertible Senior Notes

The convertible senior notes consisted of the following:

	Year Ended December 31,
	2019			2018
Principal	$	143,750		$	143,750
Less: debt discount, net of amortization	(21,231		)	(26,636		)
Less: debt issuance costs, net of amortization	(2,803		)	(3,528		)
Net carrying amount of the convertible senior notes	$	119,716		$	113,586

Interest Income and Interest Expense Disclosure

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

	Year Ended December 31,
	2019		2018
Amortization of debt discount	$	5,405	$	2,280
Amortization of debt issuance costs	724		304
Total amortization of debt issuance costs and accretion of equity portion	6,129		2,584
Contractual interest expense	2,516		1,097
Total interest expense related to the convertible senior notes	$	8,645	$	3,681