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Certain Balance Sheet Accounts - Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total cost	$ 10,198	$ 9,864
Less accumulated depreciation and amortization	(7,647)	(6,035)
Total property and equipment, net	2,551	3,829
Depreciation and amortization	1,616	1,790	$ 962
Finance leases
Property, Plant and Equipment [Line Items]
Total cost	5,690	5,474
Laboratory equipment
Property, Plant and Equipment [Line Items]
Total cost	2,898	2,844
Computer equipment
Property, Plant and Equipment [Line Items]
Total cost	985	921
Office equipment and furniture
Property, Plant and Equipment [Line Items]
Total cost	$ 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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Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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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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