XML 177 R157.htm IDEA: XBRL DOCUMENT v3.21.1

CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' DEFICIT - Shares Reserved for Issuance (Details) - shares	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Common shares reserved for issuance	270,663,755	277,129,612	273,914,985
Shares reserved for convertible preferred stock outstanding
Common shares reserved for issuance	175,531,186	175,440,744	191,142,894
Shares reserved for warrants to purchase shares of common stock
Common shares reserved for issuance	6,001,639	6,001,639	6,001,639
Shares reserved for warrants to purchase shares of preferred stock
Common shares reserved for issuance	44,205,800	44,296,242	29,624,663
Options issued and outstanding
Common shares reserved for issuance	44,914,082	51,379,939	42,846,649
Shares available for future option grants
Common shares reserved for issuance	11,048	11,048	4,299,140

X

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ConvertiblePreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=stem_CommonStockWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=stem_PreferredStockWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_StockCompensationPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: