DESCRIPTION OF COMPANY	9 Months Ended
DESCRIPTION OF COMPANY	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF COMPANY	DESCRIPTION OF COMPANY Nature of Business Piedmont Lithium Inc. (“Piedmont Lithium,” “we,” “our,” “us,” or “Company”) is a United States (“U.S.”) based, development stage company advancing a multi-asset, integrated lithium business in support of a clean energy economy and America’s national energy security. We plan to supply lithium hydroxide to the electric vehicle and battery manufacturing supply chains in North America by processing spodumene concentrate produced from assets we own or have an economic interest. Our projects include our proposed Carolina Lithium and Tennessee Lithium projects in the southeastern U.S. and strategic investments in lithium assets in Canada and Ghana. Subject to obtaining permits and approvals, we plan to develop our operations with the aim of our equity method investments bringing spodumene concentrate production online in 2023 (Quebec) and 2024 (Ghana), and our lithium hydroxide production online in 2025 (Tennessee) and 2026 (North Carolina). Our investments in Canada should provide the opportunity for near-term revenue through production and offtake of spodumene concentrate. Offtake agreements from our international investments are expected to supply spodumene concentrate to our Tennessee Lithium project for conversion to lithium hydroxide, while our proposed Carolina Lithium project is a fully integrated spodumene-to-hydroxide operation in North Carolina. These diversified operations should enable us to play a pivotal role in supporting America’s energy independence and the electrification of transportation and energy storage. Change in Fiscal Year-End Effective January 1, 2022, we changed our fiscal year end from June 30 to December 31. The six-month period from July 1, 2021, to December 31, 2021, served as a transition period. Our fiscal year for 2022 commenced on January 1, 2022, and will end on December 31, 2022. See our Transition Report on Form 10-KT (“Transition Report”) filed with the Securities and Exchange Commission (the “SEC”) on February 28, 2022. Basis of Presentation The accompanying unaudited consolidated financial statements and related notes have been prepared on the accrual basis of accounting in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) and in conformity with the rules and regulations of the SEC applicable to interim financial information. The unaudited consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Unless otherwise indicated, all references to “$” are to U.S. dollars, and all references to “AUD” are to Australian dollars. Our reporting currency is U.S. dollars. Certain information and note disclosures normally included in the consolidated financial statements prepared in accordance with U.S. GAAP have been omitted pursuant to such rules and regulations. Therefore, these unaudited interim consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-KT for the six-month transition period ended December 31, 2021. These unaudited consolidated financial statements reflect all adjustments and reclassifications that, in the opinion of management, are considered necessary for a fair statement of the results of operations, financial position and cash flows for the periods presented. The current period’s results of operations will not necessarily be indicative of results that ultimately may be achieved for the year ending December 31, 2022, for any other interim period or for any other future fiscal year. Certain prior period amounts have been reclassified to conform with the current period presentation including reclassification of the Company’s proportional share of income in equity investments into operating income. See Note 3—Equity Method Investments in Unconsolidated Affiliates for further discussion. Piedmont Lithium acquired all of the issued and outstanding ordinary shares of Piedmont Lithium Pty Ltd (formerly named Piedmont Lithium Limited) (“Piedmont Australia”), our Australian predecessor and currently a wholly-owned subsidiary, pursuant to a Scheme of Arrangement under Australian law, which was approved by Piedmont Australia’s shareholders on February 26, 2021 and by the Supreme Court of Western Australia on May 5, 2021 (collectively referred to as “Redomiciliation”). As part of the Redomiciliation, we changed our place of domicile from Australia to the state of Delaware in the U.S., effective May 17, 2021. Piedmont Australia’s ordinary shares were listed on the Australian Securities Exchange (“ASX”), and Piedmont Australia’s American Depositary Shares (“ADSs”), each representing 100 of Piedmont Australia’s ordinary shares, were traded on the Nasdaq Capital Market (“Nasdaq”). Following the approval of the Redomiciliation, we moved the primary listing of our shares of common stock from the ASX to Nasdaq and retained an ASX listing via Chess Depositary Interests (“CDIs”), each representing 1/100th of a share of common stock of Piedmont Lithium Inc. All issued and outstanding shares of our common stock and per share amounts have been retroactively adjusted in these unaudited consolidated financial statements to reflect the 100:1 ratio and share consolidation. Shares of our common stock issued in connection with the Redomiciliation trade on Nasdaq under the symbol “PLL.” Risk and Uncertainties We are subject to a number of risks similar to those of other companies of similar size in our industry, including but not limited to, the success of our exploration and development activities, success of our equity investments in international projects, construction and permitting delays, the need for additional capital or financing to fund operating losses, competition from substitute products and services from larger companies, protection of proprietary technology, litigation, and dependence on key individuals. We have accumulated deficits of $94.8 million, and $92.7 million as of September 30, 2022 and December 31, 2021, respectively. We have incurred net losses and utilized cash in operations since inception, and we expect to incur future additional losses. We have cash available on hand and believe this cash will be sufficient to fund our operations and meet our obligations as they come due for at least one year from the date these unaudited consolidated financial statements are issued. In the event our cash requirements change during the next twelve months, management has the ability and commitment to make corresponding changes to our operating expenses as necessary. Until commercial production is achieved from our planned operations, we will continue to incur operating and investing net cash outflows associated with, among other things, funding capital projects, development stage technical studies, permitting activities associated with our projects, funding our commitments in Quebec and Ghana, maintaining and acquiring exploration properties and undertaking ongoing exploration activities. Our long-term success is dependent upon our ability to successfully raise additional capital or financing or enter into strategic partnership opportunities. Our long-term success is also dependent upon our ability to obtain certain permits and approvals, develop our planned portfolio of projects, earn revenues, and achieve profitability. Our unaudited consolidated financial statements have been prepared on a going-concern basis, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates, assumptions, and allocations that affect amounts reported in the consolidated financial statements and related notes. Significant items that are subject to such estimates and assumptions include, but are not limited to, long-lived assets, fair value of stock-based compensation awards, income tax uncertainties, valuation of deferred tax assets, contingent assets and liabilities, legal claims, asset impairments and environmental remediation. Actual results could differ due to the uncertainty inherent in the nature of these estimates. We base our estimates and assumptions on current facts, historical experience and various other factors that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities and the accrual of costs and expenses that are not readily apparent from other sources. Actual results may differ materially and adversely from our estimates. To the extent there are material differences between the estimates and the actual results, future results of operations will be affected. Significant Accounting Policies Exploration and Mine Development Costs We incur costs in resource exploration, evaluation and development during the different phases of our resource development projects. Exploration costs incurred before the declaration of proven and probable reserves, which primarily include exploration, drilling, engineering, metallurgical test-work, and compensation for employees associated with exploration activities, are expensed as incurred. We have also expensed as incurred engineering costs attributable to the evaluation of land for our future lithium hydroxide conversion plants and spodumene concentrator, development project management costs, feasibility studies and other project expenses that do not qualify for capitalization. After proven and probable reserves are declared, exploration and mine development costs necessary to bring the properties to commercial capacity, increase their capacity or extend their useful life are capitalized. Mine Development Mine development assets include engineering and metallurgical test-work, drilling and other related costs to delineate an ore body, and the removal of overburden to initially expose an ore body at open pit surface mines. Costs incurred before mineral resources are classified as proven and probable reserves are expensed and recorded to “Exploration and mine development costs” in our statements of operations. Capitalization of mine development project costs begins once mineral resources are classified as proven and probable reserves. Drilling and related costs are capitalized for an ore body where proven and probable reserves exist and the activities are directed at obtaining additional information on the ore body or converting mineralized material to proven and probable reserves. All other drilling and related costs are expensed as incurred. The cost of removing overburden and waste materials to access the ore body at an open pit mine prior to the production phase are referred to as pre-stripping costs. Pre-stripping costs will be capitalized during the development of an open pit mine. The removal, production, and sale of de minimis salable materials may occur during the development phase of an open pit mine and are assigned incremental mining costs related to the removal of that material. Mine development assets will be depleted using the units-of-production method based on estimated recoverable metric tons in proven and probable reserves. To the extent that these costs benefit an entire ore body, they will be depleted over the estimated life of the ore body. As of September 30, 2022, we had no projects in the production phase, and we did not record depletion expense for any of our mine development assets. Equity Method Investments in Unconsolidated Affiliates We apply the equity method of accounting for investments when we have significant influence, but not controlling interest in the investee. Judgment regarding the level of influence over each equity method investment includes key factors such as ownership interest, representation on the board of directors, participation in policy-making decisions, operational decision-making authority, and material intercompany transactions. Under this method of accounting, our proportionate share of the net income (loss) resulting from these investments is reported in “Loss from operations” in the consolidated statements of operations since the activities of the investees are closely aligned with, and a critical part of, our operations. The carrying value of our equity method investments is reported as “Equity method investments in unconsolidated affiliates” in our consolidated balance sheets. For all equity method investments, we record our share of an investee’s income or loss on a one quarter lag. We evaluate material events occurring during the quarter lag to determine whether the effects of such events should be disclosed in our financial statements. We classify distributions received from equity method investments using the cumulative earnings approach on our consolidated statements of cash flows. A change in our proportionate share of an investee’s equity resulting from issuance of common shares or in-substance common shares by the investee to third parties is recorded as a gain or loss in our consolidated statements of operations in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 323, “Investments-Equity Method and Joint Ventures” (Subtopic 10-40-1). We assess investments for impairment whenever events or changes in circumstances indicate that the carrying value of an investment may not be recoverable. If the decline in value is considered to be other than temporary, the investment is written down to its estimated fair value, which establishes a new cost basis in the investment. We did not record any such impairment charges for any periods presented. For a further discussion of our significant accounting policies, see Note 2—Summary of Significant Accounting Policies within Part II, Item 8 of our Transition Report for the six-month period ended December 31, 2021. Recently Issued and Adopted Accounting Pronouncements We have considered the applicability and impact of all recently issued accounting pronouncements and have determined that they were either not applicable or were not expected to have a material impact on our unaudited consolidated financial statements.