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Investment in Sales-Type Leases, Net (Details) | 6 Months Ended | 12 Months Ended
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Jun. 30, 2020 | Dec. 31, 2019
Investments [Abstract] |  |
Sale leaseback transaction lease, Terms |  | BMPG systems to Pucheng (Phase I and II, 15 and 11 year terms, respectively)
Transfer agreement, description | The ownership of Pucheng systems was transferred to Pucheng in January 2020 as a result of receiving full payment from Pucheng to Xi’an TCH. |

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- Definition Transfer agreement, descriptions. + References No definition available. + Details
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- Definition A description of the terms of the lease(s) related to the assets being leased-back in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121586228&loc=d3e50796-112755 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 40 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121606570&loc=SL77919786-209982 + Details
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