XML 175 R155.htm IDEA: XBRL DOCUMENT
v3.21.1

WARRANTS (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2021
Class of Warrant or Right [Line Items] |  |  |
Number of shares | 44,296,242 | 29,624,663 | 44,205,800
Convertible promissory notes | 2019 Convertible Notes |  |  |
Class of Warrant or Right [Line Items] |  |  |
Number of shares common shares issuable upon conversion | 5,000,000 |  |
Debt Instrument, Unamortized Discount | $ 1,200 |  |
Notes payable |  |  |
Class of Warrant or Right [Line Items] |  |  |
Debt Instrument, Unamortized Discount | 571 |  | $ 425
Notes payable | 2020 Credit Agreement |  |  |
Class of Warrant or Right [Line Items] |  |  |
Debt Instrument, Unamortized Discount | $ 200 |  |
Minimum |  |  |
Class of Warrant or Right [Line Items] |  |  |
Exercise price | $ 0.36 | $ 0.36 |
Warrant term | 1 year | 1 year |
Maximum |  |  |
Class of Warrant or Right [Line Items] |  |  |
Exercise price | $ 1.53 | $ 1.53 |
Warrant term | 5 years | 5 years | 6 years
Series A Preferred Stock Warrants |  |  |
Class of Warrant or Right [Line Items] |  |  |
Exercise price | $ 0.4485 | $ 0.4485 |
Number of shares | 178,372 | 178,372 |
Term | 10 years | 10 years |
Series D Preferred Stock Warrants 2017 |  |  |
Class of Warrant or Right [Line Items] |  |  |
Exercise price | $ 1.5326 | $ 1.5326 |
Number of shares | 6,247,984 | 6,269,223 |
Term | 7 years | 7 years |
Series D Preferred Stock Warrants 2019 and 2020 |  |  |
Class of Warrant or Right [Line Items] |  |  |
Exercise price | $ 1.5326 | $ 1.5326 |
Number of shares | 37,869,886 | 23,177,068 |
Term | 7 years | 7 years |
Shares reserved for warrants to purchase shares of common stock |  |  |
Class of Warrant or Right [Line Items] |  |  |
Number of shares | 6,001,639 | 6,001,639 | 6,001,639
Shares reserved for warrants to purchase shares of common stock | Minimum |  |  |
Class of Warrant or Right [Line Items] |  |  |
Exercise price |  |  | $ 0.36
Warrant term |  |  | 1 year
Shares reserved for warrants to purchase shares of common stock | Maximum |  |  |
Class of Warrant or Right [Line Items] |  |  |
Exercise price |  |  | $ 1.53

X
- Definition The period of time over which a warrant may be exercised. + References No definition available. + Details
Name: | stem_WarrantTerm
Namespace Prefix: | stem_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
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_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of debt discount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_WarrantsAndRightsOutstandingTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=stem_ConvertibleNotes2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_NotesPayableOtherPayablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=stem_CreditAgreement2020Member
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_ClassOfWarrantOrRightAxis=stem_SeriesConvertiblePreferredStockWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=stem_SeriesDConvertibleStockWarrants2017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=stem_SeriesDConvertibleStockWarrants2019And2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=stem_CommonStockWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |