Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2019

Payables and Accruals [Abstract]

Schedule of Accrued Expenses

Accrued expenses consist of the following (in thousands):

	December 31,		December 31,
	2019		2018
Payroll and employee related expenses	$	2,235	$	2,497
Current portion of deferred rent and lease incentive	—		117
Collaboration and licensing	1,050		1,222
Accrued patent fees	487		736
Accrued external research and development costs	4,379		5,344
Accrued professional and consulting services	446		994
Accrued grant refund	—		175
Accrued interest	82		106
Issuance costs, December financing	4,381		—
Other	432		509
Accrued expenses	$	13,492	$	11,700