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Customer Supply Agreement | 9 Months Ended
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Sep. 30, 2021
Additional Term of Contract [Abstract] |
Customer Supply Agreement | Customer Supply Agreement On September 30, 2020, the Company and Cabot Norit Americas, Inc., ("Cabot") entered into a supply agreement (the "Supply Agreement") pursuant to which the Company agreed to sell and deliver to Cabot, and Cabot agreed to purchase and accept from the Company certain lignite-based AC products ("Furnace Products"). As part of the Supply Agreement, the Company and Cabot agreed to additional terms whereby Cabot reimburses the Company for certain capital expenditures incurred by the Company that are necessary to manufacture the Furnace Products, and both the Company and Cabot must mutually agree on these capital expenditures in advance of procurement and commissioning. Capital expenditures incurred that benefit both the Company and Cabot ("Shared Capital") are partially reimbursable by Cabot and recognized as revenues based on a formula contained in the Supply Agreement. Revenues from, and reimbursements of, Shared Capital are recognized and billable, respectively, beginning on the first day of a half year (January 1 and July 1 of a calendar year) following the placed in service date of a Shared Capital asset(s). Capital expenditures incurred that benefit Cabot exclusively ("Specific Capital") are fully reimbursable by Cabot and recognized as revenues based on a formula contained in the Supply Agreement. Revenues earned from Specific Capital are recognized beginning on the first day of a half year following the placed in service date of a Specific Capital asset(s). Reimbursements of Specific Capital are billable in quarterly installments beginning on the first day of a half year following the placed in service date of a Specific Capital asset(s). In the event that Cabot ceases to make purchases under the Supply Agreement, Cabot is obligated to pay the balance of any outstanding amounts for Specific Capital. Revenues earned from both Shared Capital and Specific Capital are reported in the Consumables revenue line item in the Statements of Operations.

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