Supplemental Disclosures (Tables)

6 Months Ended

Jun. 30, 2019

Payables And Accruals [Abstract]

Schedules of Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consists of the following (in thousands):

	June 30, 2019		December 31, 2018
Accrued personnel costs	$	6,692	$	9,484
Accrued external research and development expenses		4,925		4,274
Accrued sublicense fees and royalties		1,514		1,617
Accrued external general and administrative expenses		1,498		773
Accrued income taxes payable		564		726
Accrued purchases of property and equipment		397		221
Other accrued expenses and current liabilities		944		69
	$	16,534	$	17,164