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Derivatives and Fair Value Disclosures - Additional Information - 2 (Detail) - USD ($)		6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Depreciation, total		$ 170,884	$ 37,455,093	$ 37,693,733	$ 41,258,142
Impairment of long-lived assets to be disposed of	$ 305,607		714,895
Tangible Asset Impairment Charges				993,916
Property, Plant and Equipment, Net		832,335,059	832,335,059	$ 835,152,403	$ 884,748,691
Gas Pasha And Gas Evoluzione [Member]
Derivatives, Fair Value [Line Items]
Property, Plant and Equipment, Net		$ 2,829,116	$ 2,829,116

X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

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