Term Loan (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Schedule of Outstanding Loan and Unamortized Debt Discount Balances

The outstanding loan and unamortized debt discount balances as of March 31, 2019 in accordance with the repayment terms under the Amended and Restated Loan Agreement are as follows:

	March 31,			December 31,
	2019			2018
Term loan	$	15,500		$	15,500
Less: unamortized discount on loan		(544	)		(600	)
Less: current portion		—			—
Accrued portion of final payment fee		183			114
Loan payable, long-term	$	15,139		$	15,014

Schedule of Principal Payments on Outstanding Debt

Scheduled principal payments on outstanding debt as of March 31, 2019, excluding the final payment fee of $1,008, are as follows:

2019	$	—
2020		5,167
2021		6,200
2022		4,133
Total	$	15,500