XML 41 R31.htm IDEA: XBRL DOCUMENT v3.22.2.2

Summary of Significant Accounting Policies - Summary of Property and Equipment and Their Estimated Useful Lives (Details)	9 Months Ended
	Sep. 30, 2022
Computer Equipment, Hardware, and Software | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets	3 years
Computer Equipment, Hardware, and Software | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets	5 years
Furniture and Fixtures | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets	7 years
Furniture and Fixtures | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets	10 years
Machinery and Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets	3 years
Machinery and Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets	10 years
Leasehold Improvements
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets	Shorter of the lease term (including estimated renewals) or the estimated useful lives of the improvements

X

- Definition

Summary of significant accounting policies.

+ References

No definition available.

+ Details

Name:	qs_SummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix:	qs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 35
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=126905813&loc=d3e1205-110223

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=qs_ComputerEquipmentHardwareAndSoftwareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: