Concentrations (Details) - leasedProperty |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Concentration Risk [Line Items] | |||
| Number of significant leased properties | 1 | ||
| Revenue from Contract with Customer | Customer Concentration Risk | Spire | |||
| Concentration Risk [Line Items] | |||
| Percentage of revenues | 16.00% | 7.00% | 6.00% |
| Revenue from Contract with Customer | Customer Concentration Risk | Ameren Energy | |||
| Concentration Risk [Line Items] | |||
| Percentage of revenues | 11.00% | ||
| Revenue from Contract with Customer | Customer Concentration Risk | Department of Defense | |||
| Concentration Risk [Line Items] | |||
| Percentage of revenues | 15.00% | ||
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- Definition Number of Significant Leased Properties No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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