Commitments and Contingencies - Additional Information (Details)					1 Months Ended	6 Months Ended	12 Months Ended
	May 08, 2020 USD ($)	Jul. 15, 2019 USD ($) shares	Oct. 11, 2018 USD ($)	Feb. 24, 2014 USD ($)	Jun. 30, 2020 USD ($) shares	Jun. 30, 2021 USD ($) Vendor	Dec. 31, 2020 USD ($) Vendor	Dec. 31, 2019 USD ($)	Jan. 31, 2019 USD ($)
Other Commitments [Line Items]
Commitments to purchase natural gas on take-or-pay basis with number of vendors | Vendor						3	3
Estimated remaining commitment liability						$ 100,000	$ 900,000
Letter of credit, description						EAF is required to provide financial security in the form of a letter of credit originally in the amount of $0.5 million, which amount may decrease annually during the term of the agreement and was equal to $0.2 million and $0.3 million as of June 30, 2021 and December 31, 2020
Sheehy Enterprises, Inc. [Member]
Other Commitments [Line Items]
Security deposit									$ 900,000
Finkle and Courtlandt [Member]
Other Commitments [Line Items]
Business combination, cash paid at closing		$ 1,250,000
Business combination, estimated contingent liability related to earnout								$ 0
Finkle and Courtlandt [Member] | Common Stock [Member]
Other Commitments [Line Items]
Business combination, common stock issued | shares		1,250,000
Finkle Transport Inc. [Member] | Common Stock [Member] | Contingent Consideration [Member]
Other Commitments [Line Items]
Business combination, common stock issued | shares					870,317
Exchange of common stock fair value					$ 300,000
Maximum [Member] | Finkle and Courtlandt [Member] | Common Stock [Member]
Other Commitments [Line Items]
Business combination, earnout of additional common shares issued | shares		1,000,000
PPP Loan [Member] | Minimum [Member]
Other Commitments [Line Items]
Loan proceeds	$ 2,000,000
Incremental Natural Gas Facilities Agreement [Member]
Other Commitments [Line Items]
Upfront cost				$ 0
Term of agreement				5 years		10 years
Required payments to install pipeline						$ 100,000
Incremental Natural Gas Facilities Agreement [Member] | Letter of Credit [Member]
Other Commitments [Line Items]
Principal amount						500,000
Annual decrease in financial security						$ 200,000	$ 300,000
El Toro [Member]
Other Commitments [Line Items]
Loss contingency, damages awarded value			$ 200,000