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Note 8 - Leases | 12 Months Ended
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Dec. 31, 2022
Notes To Financial Statements |
LEASES | NOTE 8—LEASES ​ The Company has various finance leases for mining equipment, which are generally for terms up to 36 months and expire through 2025. In addition, we have one operating lease for office space with a term of approximately five years that runs through 2027. ​ Amortization of right of use assets associated with finance leases was $4.8 million, $1.1 million, and $0.0 million in 2022, 2021, and 2020, respectively, as discussed in Note 3. Interest expense recognized for financing lease liabilities was $0.4 million, $0.1 million, and $0.0 million in 2022, 2021, and 2020, respectively. Operating lease expense was $0.2 million in 2022 and $0.1 million per year in 2021 and 2020. ​ Right-of-use assets and lease liabilities are determined as the present value of the lease payments, discounted using either the implicit interest rate in the lease or our estimated incremental borrowing rate based on similar terms, payments and the economic environment where the leased asset is located. Below is a summary of our leases: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In thousands) | Classification | ​ | December 31, 2022 | ​ | December 31, 2021
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Right-of-use assets | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financing | Financing lease right-of-use assets, net | ​ | $ | 12,905 | ​ | $ | 9,128
Operating | Other assets | ​ | ​ | 694 | ​ | ​ | 25
Total right-of-use assets | ​ | ​ | $ | 13,599 | ​ | $ | 9,153
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Current lease liabilities | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financing | Current portion of financing lease obligations | ​ | $ | 5,969 | ​ | $ | 3,461
Operating | Accrued expenses | ​ | ​ | 122 | ​ | ​ | 25
Non-current lease liabilities | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financing | Long-term portion of financing lease obligations | ​ | $ | 4,917 | ​ | $ | 4,599
Operating | Other long-term liabilities | ​ | ​ | 585 | ​ | ​ | —
Total lease liabilities | ​ | ​ | $ | 11,593 | ​ | $ | 8,085
​ Minimum lease payments for our lease obligations are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2022
(In thousands) |  | Financing |  | Operating |  | Total
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Future minimum lease payments: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2023 | ​ | $ | 6,302 | ​ | $ | 161 | ​ | $ | 6,463
2024 | ​ | ​ | 4,005 | ​ | ​ | 161 | ​ | ​ | 4,166
2025 | ​ | ​ | 1,032 | ​ | ​ | 164 | ​ | ​ | 1,196
2026 | ​ | ​ | — | ​ | ​ | 168 | ​ | ​ | 168
2027 | ​ | ​ | — | ​ | ​ | 168 | ​ | ​ | 168
Total undiscounted lease payments | ​ | ​ | 11,339 | ​ | ​ | 822 | ​ | ​ | 12,161
Less: Amounts representing interest | ​ | ​ | (453) | ​ | ​ | (115) | ​ | ​ | (568)
Present value of lease obligations | ​ | $ | 10,886 | ​ | $ | 707 | ​ | $ | 11,593
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average remaining term (years) | ​ | ​ | 2.0 | ​ | ​ | 5.0 | ​ | ​ | ​
Weighted average discount rate | ​ | ​ | 4.2% | ​ | ​ | 6.0% | ​ | ​ | ​
​ Coal Leases and Associated Royalty Commitments—Leases of mineral reserves and related land leases are exempt from the lease accounting requirements addressed above. Refer to Note 10 for information regarding coal leases and associated royalty commitments. ​

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI https://asc.fasb.org/subtopic&trid=77888251 + Details
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