XML 61 R51.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Warrant Liability - Summary of Changes in Fair Value of Warrant Liability (Detail) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2014
Class of Warrant or Right [Line Items] |  |
Number of Warrants, ending balance | 7,666,895 | 7,666,895
Series A Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Number of Warrants, beginning balance | 8,116,895 |
Number of Warrants, Less exercised | (850,000) | (850,000)
Number of Warrants, changes in fair value |  |
Number of Warrants, ending balance | 7,266,895 | 7,266,895
Fair value of warrant liability, beginning balance | $ 5,868,433 |
Fair value of warrants exercised | (997,237) |
Fair value, changes in fair value at period end | 3,654,470 |
Fair value of warrant liability, ending balance | $ 8,525,666 | $ 8,525,666

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

X
- Definition Fair value of warrants. + References No definition available. + Details
Name: | stem_FairValueOfWarrants
Namespace Prefix: | stem_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of warrants exercised. + References No definition available. + Details
Name: | stem_FairValueOfWarrantsExercised
Namespace Prefix: | stem_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Increase Decrease In Fair Value Of Warrant + References No definition available. + Details
Name: | stem_IncreaseDecreaseInFairValueOfWarrant
Namespace Prefix: | stem_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Increase Decrease In Number Of Warrants + References No definition available. + Details
Name: | stem_IncreaseDecreaseInNumberOfWarrants
Namespace Prefix: | stem_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number 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)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Article 4 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant