XML 66 R46.htm IDEA: XBRL DOCUMENT v3.5.0.2

Stock-Based Compensation - Summary of Changes in Restricted Stock Units (Parenthetical) (Detail)	Aug. 01, 2016 Employees
Subsequent Events [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduction in workforce, number of employees affected	50

X

- Definition

Number of impacted employees due to workforce reduction.

+ References

No definition available.

+ Details

Name:	stem_NumberOfImpactedEmployeesDueToWorkforceReduction
Namespace Prefix:	stem_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

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.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: