XML 194 R174.htm IDEA: XBRL DOCUMENT v3.21.1

EMPLOYER RETIREMENT PLAN (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
EMPLOYER RETIREMENT PLAN
401 (k) plan	usgaap:QualifiedPlanMember
401(k) plan	country:US
Percentage of compensation employees may defer, minimum	1.00%
Percentage of compensation employees may defer, maximum	75.00%
No employer match	$ 0	$ 0

X

- Definition

Minimum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	stem_DefinedContributionPlanMinimumAnnualContributionsPerEmployeePercent
Namespace Prefix:	stem_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Indicates location of employer sponsoring defined contribution plan designed to provide retirement benefits.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanSponsorLocationExtensibleList
Namespace Prefix:	us-gaap_
Data Type:	srt-types:extensibleListItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Indicates type of defined contribution plan. Includes, but is not limited to, pension plan, other postretirement plan and special and contractual termination benefits payable upon retirement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

+ Details

Name:	us-gaap_DefinedContributionPlanTypeExtensibleList
Namespace Prefix:	us-gaap_
Data Type:	srt-types:extensibleListItemType
Balance Type:	na
Period Type:	instant