Prepaid expenses and other current assets (Tables)

12 Months Ended

Dec. 31, 2018

Prepaid expense and other current assets

Schedule of prepaid expense and other current assets

Prepaid expenses and other current assets consist of the following:

	As of December 31,
	2018		2017
	(in thousands)
Prepaid research and development contracts	$	4,497	$	1,330
Other current assets		1,360		766
Prepaid insurance		617		520
Accrued interest receivable		201		122
Total	$	6,675	$	2,738