Prepaid Expenses and Other Current Assets (Tables)

12 Months Ended

Dec. 31, 2019

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following (in thousands):

	December 31,
	2019		2018
Research and development claims receivable	$	27,567	$	10,272
Prepayments	7,023		2,069
VAT receivable	1,928		1,973
Other asset	279		—
Grant income receivable	547		661
Other receivable	482		436
Total prepaid expenses and other current assets	$	37,826	$	15,411