XML 33 R45.htm IDEA: XBRL DOCUMENT v2.4.1.9
Warrant Liability - Summary of Warrant Liability (Detail) (USD $)
Mar. 31, 2015
Class of Warrant or Right [Line Items]  
Number Outstanding 7,336,880us-gaap_ClassOfWarrantOrRightOutstanding
Outstanding Warrants [Member]  
Class of Warrant or Right [Line Items]  
Fair Value 2,031,881us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
Series A Warrants [Member]  
Class of Warrant or Right [Line Items]  
Number Outstanding 6,936,880us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= stem_SeriesWarrantMember
Exercise Price per share 1.40us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= stem_SeriesWarrantMember
Series A Warrants [Member] | Outstanding Warrants [Member]  
Class of Warrant or Right [Line Items]  
Fair Value 2,031,881us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_ClassOfWarrantOrRightAxis
= stem_SeriesWarrantMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_WarrantMember
November 2009 Financing [Member]  
Class of Warrant or Right [Line Items]  
Number Outstanding 400,000us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_SubsidiarySaleOfStockAxis
= stem_NovemberTwoThousandNineFinancingMember
Exercise Price per share 15.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_SubsidiarySaleOfStockAxis
= stem_NovemberTwoThousandNineFinancingMember