XML 35 R57.htm IDEA: XBRL DOCUMENT v2.4.0.8

Fair Value Measurement - Roll Forward for Financial Assets and Liabilities Measured at Fair Value Using Significant Other Observable Inputs (Level 2) (Detail) (Fair Value, Measurements [Member], USD $)			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 Significant Other Observable Inputs Level 2 [Member]	Dec. 31, 2013 Significant Other Observable Inputs Level 2 [Member] Bond obligation [Member]	Dec. 31, 2013 Significant Other Observable Inputs Level 2 [Member] Outstanding warrants [Member]	Dec. 31, 2013 Significant Other Observable Inputs Level 2 [Member] Marketable securities [Member]	Dec. 31, 2012 Significant Other Observable Inputs Level 2 [Member] Marketable securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable debt securities, Beginning Balance	$ 29,230,143		$ 331,250	$ 107,968		$ 13,900,678
Fair Value Measurement With Unobservable inputs reconciliation recurring basis asset transfers into level 1					(13,900,678)
Financial liabilities change included in earning fair value disclosure				(107,968)
Financial liabilities change settled in earning fair value disclosure			(206,250)
Marketable debt securities, Ending Balance	$ 29,230,143		$ 125,000			$ 13,900,678

X

- Definition

Fair Value Measurement With Directly Or Indirectly Observable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings

+ References

No definition available.

+ Details

Name:	stem_FairValueMeasurementWithDirectlyOrIndirectlyObservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
Namespace Prefix:	stem_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Fair Value Measurement With Directly Or Indirectly Observable Inputs Reconciliation Recurring Basis Liability Settlements

+ References

No definition available.

+ Details

Name:	stem_FairValueMeasurementWithDirectlyOrIndirectlyObservableInputsReconciliationRecurringBasisLiabilitySettlements
Namespace Prefix:	stem_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bb)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueAssetsLevel2ToLevel1TransfersAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration