XML 38 R52.htm IDEA: XBRL DOCUMENT v2.4.0.6

Fair Value Measurement (Details 1) (Fair Value, Measurements [Member], USD $)				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012 Marketable debt securities [Member]	Dec. 31, 2011 Marketable debt securities [Member]	Dec. 31, 2012 Bond obligation [Member]	Dec. 31, 2012 Warrant liabilities [Member]
Roll forward for financial assets and liabilities measured at fair value using significant other observable inputs (Level 2)
Marketable debt securities, Beginning Balance	$ 22,117,685	$ 13,900,678	$ 3,280,591	$ 522,500	$ 31,195
Fair Value Measurement With Unobservable inputs reconciliation recurring basis asset transfers into level 1		10,620,087
Financial liabilities change included in earning fair value disclosure					76,773
Financial liabilities change settled in earning fair value disclosure				(191,250)
Marketable debt securities, ending Balance	$ 22,117,685	$ 13,900,678	$ 3,280,591	$ 331,250	$ 107,968

X

- Details

Name:	stem_FairValueAssetsMeasuredOnRecurringBasisDirectlyOrIndirectlyObservableInputReconciliationCalculationRollForward
Namespace Prefix:	stem_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ 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=7578670&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=7578670&loc=d3e19207-110258

+ Details

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