XML 67 R54.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Equity Financing - Additional Information (Detail) | 1 Months Ended | 3 Months Ended
--- | --- | ---
Mar. 31, 2016 USD ($) $ / shares shares | Mar. 31, 2016 USD ($) $ / shares shares
Class of Warrant or Right [Line Items] |  |
Proceeds from issuance of stock units | $ |  | $ 7,102,225
Warrant expiration period | 2 years |
Term of warrant | 5 years |
Proceeds from issuance of warrants | $ | $ 7,100,000 |
Series A Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Number of shares called by warrants | 0.50 | 0.50
Warrant exercise price | $ / shares | $ 3.60 | $ 3.60
Number of additional warrants issued | 166,473 |
Series B Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Number of shares called by warrants | 0.75 | 0.75
Warrant exercise price | $ / shares | $ 5.04 | $ 5.04
Number of additional warrants issued | 249,709 |
Underwritten Public Offering [Member] |  |
Class of Warrant or Right [Line Items] |  |
Proceeds from issuance of stock units | $ | $ 8,000,000 |
Number of stock units issued | 2,222,250 |
Number of stock units issued, price per share | $ / shares | $ 3.60 | $ 3.60
Over-Allotment-Option [Member] |  |
Class of Warrant or Right [Line Items] |  |
Number of stock units issued | 333,338 |
Number of shares called by warrants | 416,672 | 416,672
Underwriting option exercise period | 45 days |

X
- Definition Class Of Warrant Or Right Exercise Period Of Warrants Or Rights + References No definition available. + Details
Name: | stem_ClassOfWarrantOrRightExercisePeriodOfWarrantsOrRights
Namespace Prefix: | stem_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class Of Warrant Or Right Expiration Period + References No definition available. + Details
Name: | stem_ClassOfWarrantOrRightExpirationPeriod
Namespace Prefix: | stem_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class of warrant or right number of warrants or rights issued. + References No definition available. + Details
Name: | stem_ClassOfWarrantOrRightNumberOfWarrantsOrRightsIssued
Namespace Prefix: | stem_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Underwriting option exercise period. + References No definition available. + Details
Name: | stem_UnderwritingOptionExercisePeriod
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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + 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 each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
Name: | us-gaap_ProceedsFromIssuanceOfWarrants
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=stem_UnderwrittenPublicOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |