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Exploration Contracts - Exploration and evaluation expenses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Schedule Of Break Down Of Exploration Expenses [Line Items] |  |  |  |
Environmental Studies | $ 15,360 | $ 18,570 | $ 20,534 | $ 44,004
Exploration Labor | 1,030 | 819 | 3,374 | 2,397
Mining, Technological and Process Development | 242 | 694 | 813 | 1,658
PMTS | 3,685 | 26 | 6,458 | 48
Share-based compensation | 1,587 | 3,032 | 7,399 | 30,577
Sponsorship, Training and Stakeholder Engagement | 455 | 499 | 1,116 | 802
Other | 304 | 208 | 646 | 695
Exploration and evaluation expenses | 22,663 | 23,848 | 40,340 | 80,181
NORI Exploration Contract |  |  |  |
Schedule Of Break Down Of Exploration Expenses [Line Items] |  |  |  |
Environmental Studies | 15,360 | 14,871 | 20,526 | 35,331
Exploration Labor | 700 | 435 | 2,308 | 1,286
Mining, Technological and Process Development | 214 | 429 | 704 | 960
PMTS | 3,226 | 15 | 5,461 | 32
Share-based compensation | 1,122 | 1,578 | 5,142 | 16,680
Sponsorship, Training and Stakeholder Engagement | 300 | 428 | 654 | 563
Other | 278 | 194 | 573 | 587
Exploration and evaluation expenses | 21,200 | 17,950 | 35,368 | 55,439
Marawa Option Agreement |  |  |  |
Schedule Of Break Down Of Exploration Expenses [Line Items] |  |  |  |
Environmental Studies |  | 1,852 | 8 | 4,341
Exploration Labor | 167 | 199 | 541 | 555
Mining, Technological and Process Development | 16 | 185 | 57 | 402
PMTS | 229 | 7 | 499 | 9
Share-based compensation | 231 | 594 | 1,123 | 6,925
Sponsorship, Training and Stakeholder Engagement | 62 | 6 | 148 | 73
Other | 11 | 14 | 16 | 70
Exploration and evaluation expenses | 716 | 2,857 | 2,392 | 12,375
TOML Exploration Contract |  |  |  |
Schedule Of Break Down Of Exploration Expenses [Line Items] |  |  |  |
Environmental Studies |  | 1,847 |  | 4,332
Exploration Labor | 163 | 185 | 525 | 556
Mining, Technological and Process Development | 12 | 80 | 52 | 296
PMTS | 230 | 4 | 498 | 7
Share-based compensation | 234 | 860 | 1,134 | 6,972
Sponsorship, Training and Stakeholder Engagement | 93 | 65 | 314 | 166
Other | 15 |  | 57 | 38
Exploration and evaluation expenses | $ 747 | $ 3,041 | $ 2,580 | $ 12,367

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- Definition Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 23 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126939881&loc=d3e62136-109447 + Details
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