Summary of significant accounting policiess (Tables)

12 Months Ended

Dec. 31, 2019

Summary of significant accounting policies

Schedule of cash, cash equivalents and restricted cash

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the balance sheets that sum to the total of the same such amounts shown in the statements of cash flows (amounts in thousands).

	As of
	December 31,
	2019		2018
Cash and cash equivalents	$	98,849	$	150,637
Short-term and long-term restricted cash		345		491
Total cash, cash equivalents, and restricted cash shown in the statements of cash flows	$	99,194	$	151,128

Schedule of estimated useful lives of assets

Description	Estimated useful life
Computer software and equipment	3 years
Office equipment and furniture	5 years
Laboratory equipment	5 years
Leasehold improvements	Lesser of the estimated useful life or term of the lease