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LEASES (Tables) | 9 Months Ended
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Sep. 30, 2021
LEASES |
Schedule of future lease payments of operating lease and finance lease | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2022 |  | 2023 |  | 2024 |  | 2025
Operating lease payments (1) | ​ | $ | 68,132 | ​ | $ | 349,127 | ​ | $ | 356,991 | ​ | $ | 376,855 | ​ | $ | 384,719
Financing lease payments (2) | ​ | ​ | 126,889 | ​ | ​ | 336,206 | ​ | ​ | 215,530 | ​ | ​ | 142,354 | ​ | ​ | —
(1) | The weighted average discount rate as of September 30, 2021 for operating leases was 4.5%. Based on this rate, the future lease payments above include imputed interest of $165,167.
(2) | The weighted average discount rate as of September 30, 2021 for financing leases was 4.3%. Based on this rate, the future lease payments above include imputed interest of $39,771.
Schedule of lease cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Nine months ended
​ | ​ | September 30, | ​ | September 30,
​ | ​ | 2021 |  | 2020 | ​ | 2021 |  | 2020
Operating lease costs | ​ | $ | 83,589 | ​ | $ | 295,631 | ​ | $ | 439,896 | ​ | $ | 876,889
Short term lease costs (1) | ​ | ​ | 964,873 | ​ | ​ | 1,205,407 | ​ | ​ | 2,903,387 | ​ | ​ | 3,347,484
Financing lease costs: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amortization of financing lease assets (2) | ​ | ​ | 85,367 | ​ | ​ | 71,854 | ​ | ​ | 189,831 | ​ | ​ | 215,560
Interest on lease liabilities (3) | ​ | ​ | 5,160 | ​ | ​ | 7,172 | ​ | ​ | 14,166 | ​ | ​ | 24,022
(1) | Amount included in Oil and gas production costs
(2) | Amount included in Depreciation, depletion and amortization
(3) | Amount included in Interest expense

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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability and finance lease liability. + References No definition available. + Details
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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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- References No definition available. + Details
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