XML 49 R29.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Warrant Liability (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2016
Text Block [Abstract] |
Assumptions Used for Black-Scholes Model | The assumptions used for the Black-Scholes model to value the Warrants are as follows:
|  | Series A (2011) |  |  | Series A (2016) |  |  | Series B (2016) |
Risk-free interest rate per year |  |  | 0.26 | % |  |  | 0.68 | % |  |  | 1.26 | %
Expected volatility per year |  |  | 269.6 | % |  |  | 155.8 | % |  |  | 108.2 | %
Expected dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected life (years) |  |  | 0.5 |  |  |  | 1.7 |  |  |  | 5.7 |
Summary of Changes in Fair Value of Warrant Liability | The following table is a summary of the changes in fair value of warrant liability in the second quarter of 2016:
|  | Series A (2011) |  |  | Series A (2016) |  |  | Series B (2016) |  |  | Total |
Balance at December 31, 2015 |  | $ | 511,594 |  |  | $ | 1,760,937 |  |  | $ | 3,887,140 |  |  | $ | 6,159,671 |
Changes in fair value |  |  | (454,308 | ) |  |  | (1,600,713 | ) |  |  | (3,513,613 | ) |  |  | (5,568,634 | )
Balance at June 30, 2016 |  | $ | 57,286 |  |  | $ | 160,224 |  |  | $ | 373,527 |  |  | $ | 591,037 |

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
- References No definition available. + Details
Name: | us-gaap_TextBlockAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration