Long-term Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Schedule of Principal and Interest Payments of Debt

As of December 31, 2018, the scheduled principal and interest payments (based on the interest rate of 8.0 percent as of December 31, 2018) as well as the back-end fee described above are as follows:

	Principal			Interest		Back-end fee		Total
2019	$	5,333		$	1,061	$	—	$	6,394
2020	5,333			633		—		5,966
2021	4,889			198		1,440		6,527
Thereafter	—			—		—		—
Total scheduled payments	$	15,555		$	1,892	$	1,440	$	18,887
Less: debt discount and issuance costs	$	(1,476	)
Less: current portion of long-term debt	$	(4,812	)
Long-term debt	$	9,267