Supplemental Disclosures

6 Months Ended

Jun. 30, 2020

Payables And Accruals [Abstract]

Supplemental Disclosures

11. Supplemental Disclosures

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

	June 30, 2020		December 31, 2019
Accrued personnel costs	$	9,356	$	10,903
Accrued external research and development expenses		6,832		5,791
Accrued sublicense fees and royalties		6,602		4,542
Accrued external general and administrative expenses		2,069		2,053
Accrued purchases of property and equipment		887		1,328
Other accrued expenses and current liabilities		93		229
	$	25,839	$	24,846