Subsequent Events	6 Months Ended
Jun. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	17. Subsequent events In July 2021, the Company entered into an agreement to lease 163,193 square feet of industrial space located in Fremont, CA for the construction of a GMP manufacturing facility. The initial term of the lease is July 2021 through November 2031 and includes the option to extend for up to two additional five-year terms. The Company will be obligated to pay base rent of $28.6 million over the initial term of the lease. In accordance with the lease agreement, the Company has obtained a letter of credit in the amount of $6.4 million, which amount is subject to reduction to $0.5 million under certain circumstances starting in July 2023.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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