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Certain Balance Sheet Accounts - Property and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total cost	$ 10,298		$ 10,298		$ 10,198
Less accumulated depreciation and amortization	(8,391)		(8,391)		(7,647)
Total property and equipment, net	1,907		1,907		2,551
Depreciation and amortization	400	$ 400	745	$ 814
Finance leases
Property, Plant and Equipment [Line Items]
Total cost	5,690		5,690		5,690
Laboratory equipment
Property, Plant and Equipment [Line Items]
Total cost	2,998		2,998		2,898
Computer equipment
Property, Plant and Equipment [Line Items]
Total cost	985		985		985
Office equipment and furniture
Property, Plant and Equipment [Line Items]
Total cost	$ 625		$ 625		$ 625

X

- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

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- Definition

Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease.

+ References

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Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount, before accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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