Revenue - Additional Information (Details) $ in Millions |
3 Months Ended | 9 Months Ended |
|---|---|---|
|
Sep. 30, 2020
USD ($)
|
Sep. 30, 2020
USD ($)
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|
| Revenue Recognition [Abstract] | ||
| Payment term on product sales | 30 days | |
| Payment term on installation services | 30 days | |
| Payment term on contractually determined milestones | 30 days | |
| Payment term on energy production contract invoices | 30 days | |
| Revenue recognized that was in unbilled revenue at beginning of period | $ 2.2 | |
| Revenue billed this period that had been recognized in previous periods | 1.8 | |
| Deferred revenue recognized | 2.6 | |
| Remaining performance obligations | $ 8.3 | $ 8.3 |
| Performance obligation revenue expected to be recognized over the next 24 months (percent) | 99.00% | 99.00% |
| Performance obligation revenue to be recognized in first 12 months (percent) | 98.00% | 98.00% |
| Performance obligation revenue to be recognized over the subsequent 12 months (percent) | 1.00% | 1.00% |
| X | ||||||||||
- Definition Payment Term on Contractually Determined Milestones No definition available.
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| X | ||||||||||
- Definition Payment Term on Energy Production Contract Invoices No definition available.
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| X | ||||||||||
- Definition Payment Term on Installation Services No definition available.
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| X | ||||||||||
- Definition Payment Term on Product Sales No definition available.
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| X | ||||||||||
- Definition Performance Obligation Recognized in Year Two, Percent No definition available.
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| X | ||||||||||
- Definition Performance Obligation Recognized over Next Twelve Months, Percent No definition available.
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| X | ||||||||||
- Definition Performance Obligation Recognized over Next Two Years, Percent No definition available.
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| X | ||||||||||
- Definition Unbilled Revenue, Revenue Recognized No definition available.
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| X | ||||||||||
- Definition Amount of revenue recognized from performance obligation satisfied or partially satisfied in previous reporting periods. Includes, but is not limited to, change in transaction price. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of revenue recognized that was previously reported as deferred or unearned revenue. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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