XML 48 R23.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Warrant Liability (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2015
Text Block [Abstract] |
Assumptions Used for Simulation Model | The assumptions used for the Monte Carlo simulation model to value the outstanding Series A Warrants at March 31, 2015 are as follows:
Risk-free interest rate per year |  |  | 0.45 | %
Expected volatility per year |  |  | 57.8 | %
Expected dividend yield |  |  | 0 | %
Expected life (years) |  |  | 1.7 |
Summary of Changes in Fair Value of Warrant Liability | The following table is a summary of the changes in fair value of warrant liability for the Series A Warrants in 2015:
|  | Series A |
|  | Number of Warrants |  |  | Fair value $ |
Balance at December 31, 2014 |  |  | 6,936,880 |  |  | $ | 1,684,551 |
Changes in fair value |  |  | — |  |  |  | 347,330 |
Balance at March 31, 2015 |  |  | 6,936,880 |  |  | $ | 2,031,881 |
Summary of Warrant Liability | The following table is a summary of our warrant liability as of March 31, 2015:
Warrants |  | Number Outstanding |  |  | Exercise Price ($) per share |  |  | Fair value |
Warrants issued in 2009 |  |  | 400,000 |  |  |  | 15.00 |  |  | $ | — |
Series A Warrants |  |  | 6,936,880 |  |  |  | 1.40 |  |  |  | 2,031,881 |
Total |  |  | 7,336,880 |  |  |  |  |  |  | $ | 2,031,881 |

X
- Definition Fair Value Assumptions Table [Text Block] + References No definition available. + Details
Name: | stem_FairValueAssumptionsTableTextBlock
Namespace Prefix: | stem_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary Of Changes In Fair Value Of Warrant Liability Table [Text Block] + References No definition available. + Details
Name: | stem_SummaryOfChangesInFairValueOfWarrantLiabilityTableTextBlock
Namespace Prefix: | stem_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary Of Outstanding Warrants And Fair Value Of Warrant Liability Table [Text Block] + References No definition available. + Details
Name: | stem_SummaryOfOutstandingWarrantsAndFairValueOfWarrantLiabilityTableTextBlock
Namespace Prefix: | stem_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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