XML 70 R50.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Commitments and Contingencies - Additional Information (Detail) - USD ($) | 1 Months Ended |
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2010 | Aug. 01, 2016
BMR-Gateway Boulevard LLC [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Term of lease |  | 11 years 6 months |
Rent over term of lease |  | $ 17,869,000 |
BMR-Gateway Boulevard LLC [Member] | Subsequent Events [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Lease termination fee payable |  |  | $ 800,000
Amount of deposit forfeit/refund receivable |  |  | 333,000
Prologis, L.P [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Term of lease | 10 years |  |
Rent over term of lease | $ 3,497,000 |  |
Prologis, L.P [Member] | Subsequent Events [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Lease termination fee payable |  |  | 0
Amount of deposit forfeit/refund receivable |  |  | $ 40,000

X
- Definition Commitment And Contingencies [Line Items] + References No definition available. + Details
Name: | stem_CommitmentAndContingenciesLineItems
Namespace Prefix: | stem_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Deposit refund receivable. + References No definition available. + Details
Name: | stem_DepositRefundReceivable
Namespace Prefix: | stem_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Term of operating lease. + References No definition available. + Details
Name: | stem_TermOfOperatingLease
Namespace Prefix: | stem_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
Name: | us-gaap_ContractualObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=stem_BmrGatewayBoulevardLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=stem_PrologisLpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |