Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Summary of Reconciliation of Cash and Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash and cash equivalents and restricted cash as reported on the consolidated balance sheets to the total of these amounts as reported at the end of the period in the consolidated statements of cash flows (in thousands):

	As of December 31,
	2021		2020		2019
Cash and cash equivalents	$	345,209	$	338,426	$	69,514
Restricted cash		2,030		1,330		1,330
Total cash and cash equivalents and restricted cash	$	347,239	$	339,756	$	70,844

Schedule of Revenue or Accounts Receivable by Major Customers

The following table summarizes those customers who represented at least 10% of revenues or total net accounts receivable for the periods presented:

	Revenues									Accounts Receivable, Net
	Years Ended December 31,									As of December 31,
	2021			2020			2019			2021			2020
Customer A		79	%	*			*			*			*
Customer B		20	%		94	%		69	%		77	%		44	%
Customer C	*			*			*				14	%		48	%
Customer D	*			*				13	%	*			*
Customer E	*			*				10	%	*			*

*	Represented less than 10%

Summary of Estimated Useful Lives of Assets

Depreciation and amortization is calculated using the straight-line method over the estimated useful lives of the assets, which are as follows:

	Estimated Useful Life
Computer equipment and software	3 years
Furniture and fixtures	5 years
Laboratory and manufacturing equipment	5 to 15 years
Leasehold improvements	Shorter of lease term or estimated useful life