Notes Payable (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Composition of Notes Payable

Amounts outstanding under the SVB loan agreements were as follows:

	December 31,
	2018			2017
	(in thousands)
Principal amount outstanding	$	10,000		$	10,000
Unamortized debt discount	(69		)	(119		)
Accreted final payment fee	367			41
Total note payable	10,298			9,922
Less: current maturities	(2,294		)	—
Long-term note payable, net of current portion	$	8,004		$	9,922

Future Annual Minimum Principal Payments of Notes Payable

Future annual minimum principal payments under the 2017 SVB Loan Agreement as of December 31, 2018 for the respective calendar years are as follows (in thousands):

2019	$	2,333
2020	4,000
2021	3,667
Total	$	10,000