DESCRIPTION OF COMPANY	6 Months Ended
DESCRIPTION OF COMPANY	Dec. 31, 2021
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 development stage company centered on developing a multi-asset, integrated lithium business that enables the transition to a net zero carbon world and the creation of a clean energy economy in North America. Through this endeavor, we are focused on developing and manufacturing lithium products for the fast-growing electric vehicle industry. The centerpiece of our operations, our wholly-owned Carolina Lithium Project (“Carolina Lithium Project”), is in the development stage and is located in the renowned Carolina Tin-Spodumene Belt of North Carolina. We are geographically diversified with equity investments in strategic partnerships that own lithium resource assets in Canada and Ghana. Collectively, these resource assets and the location of these assets in the United States (“U.S.”), Canada and Ghana, strategically position us to be a large, low-cost, sustainable producer of lithium products and byproducts, including quartz, feldspar and mica, serving the North American and European electric vehicle and battery supply chains. The geology, geography and proximity of our resources, planned production operations and customer base, should allow us to deliver a valuable continuous supply of high-quality, sustainably produced lithium hydroxide from spodumene concentrate, which is preferred by most electric vehicle manufacturers. Our diversified operations should enable us to play a pivotal role in supporting the move toward decarbonization and the electrification of transportation and energy storage in the United States of America. Change in Fiscal Year End On December 9, 2021, our Board of Directors (the “Board”) approved a change in our fiscal year end from June 30 to December 31, effective January 1, 2022. As a result of this change, we are filing this Transition Report on Form 10-KT (“Transition Report”) for the six-month transition period ended December 31, 2021. Redomiciliation Piedmont Lithium Inc. acquired all of the issued and outstanding ordinary shares of Piedmont Lithium Limited (“Piedmont Australia”), our Australian predecessor and 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 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 on 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 our primary listing 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 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.” Basis of Presentation Our consolidated financial statements have been prepared in U.S dollars and in accordance with generally accepted accounting principles in the United States (“GAAP”) and pursuant to the applicable rules and regulations of the Securities and Exchange Commission (“SEC”). The 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. Prior to the Redomiciliation, Piedmont Australia reported its consolidated financial statements in accordance with International Financial Reporting Standards. Following the Redomiciliation, we transitioned to GAAP and applied GAAP retrospectively for all prior periods presented. In the opinion of management, all necessary adjustments (consisting of normal recurring adjustments, intercompany adjustments, reclassifications and non-recurring adjustments) have been recorded to present fairly our financial position for all periods presented. Certain prior period amounts have been reclassified to conform with the current period presentation. 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, need for additional capital or financing to fund operating losses, competition from substitute products and services from larger companies, protection of proprietary technology, patent litigation, and dependence on key individuals. We have accumulated deficits of $92.7 million, $71.3 million, and $51.6 million, as of December 31, 2021, June 30, 2021, and June 30, 2020, 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 within one year from the date these consolidated financial statements are issued. In the event our cash requirements change during the next twelve months, management has the ability and commitment to reduce 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, 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 mine, construct our concentrator and chemical plants, earn revenues, and achieve profitability. Our 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 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, 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 it believes 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. The actual results experienced 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.