XML 44 R24.htm IDEA: XBRL DOCUMENT
v3.21.1

Quarterly Financial Information (Unaudited) (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Star Peak Energy Transition Corp [Member] |
Schedule of Unaudited Condensed Statement of Operations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of September 30, 2020
​ | ​ | As Previously | ​ | Restatement | ​ | ​
​ |  | Reported |  | Adjustment |  | As Restated
Balance Sheet | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total assets | ​ | $ | 386,179,543 | ​ | $ | — | ​ | $ | 386,179,543
Liabilities and stockholders’ equity | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total current liabilities | ​ | $ | 716,028 | ​ | $ | — | ​ | $ | 716,028
Deferred legal fees | ​ | ​ | 203,910 | ​ | ​ | — | ​ | ​ | 203,910
Deferred underwriting commissions | ​ | ​ | 13,425,476 | ​ | ​ | — | ​ | ​ | 13,425,476
Stock warrant liabilities | ​ | ​ | — | ​ | ​ | 11,822,148 | ​ | ​ | 11,822,148
Total liabilities | ​ | ​ | 14,345,414 | ​ | ​ | 11,822,148 | ​ | ​ | 26,167,562
Class A common stock, $0.0001 par value; shares subject to possible redemption | ​ | ​ | 366,834,120 | ​ | ​ | (11,822,140) | ​ | ​ | 355,011,980
Stockholders’ equity | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Preferred stock- $0.0001 par value | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Class A common stock - $0.0001 par value | ​ | ​ | 168 | ​ | ​ | 118 | ​ | ​ | 286
Class B common stock - $0.0001 par value | ​ | ​ | 959 | ​ | ​ | — | ​ | ​ | 959
Additional paid-in-capital | ​ | ​ | 5,394,034 | ​ | ​ | (126) | ​ | ​ | 5,393,908
Accumulated deficit | ​ | ​ | (395,152) | ​ | ​ | — | ​ | ​ | (395,152)
Total stockholders’ equity | ​ | ​ | 5,000,009 | ​ | ​ | (8) | ​ | ​ | 5,000,001
Total liabilities and stockholders’ equity | ​ | $ | 386,179,543 | ​ | $ | — | ​ | $ | 386,179,543

X
- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
Name: | us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=stem_StarPeakEnergyTransitionCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |