0000001 - Document - COVER link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN REDEEMABLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - PRICE PROTECTION AGREEMENT link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - CASH, CASH EQUIVALENTS AND INVESTMENTS link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - INVENTORIES link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - PROPERTY, PLANT AND EQUIPMENT link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - ASSET RETIREMENT AND ENVIRONMENTAL OBLIGATIONS link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - DEBT OBLIGATIONS link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - OPERATING LEASES link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - REDEEMABLE PREFERRED STOCK link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - SUPPLEMENTAL BALANCE SHEET INFORMATION link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - REVENUE RECOGNITION link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - GOVERNMENT GRANTS link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - STOCK-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 9952174 - Disclosure - EARNINGS (LOSS) PER SHARE link:presentationLink link:calculationLink link:definitionLink 9952175 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 9952176 - Disclosure - SEGMENT REPORTING link:presentationLink link:calculationLink link:definitionLink 9952177 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - PRICE PROTECTION AGREEMENT (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - INVENTORIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - PROPERTY, PLANT AND EQUIPMENT (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - DEBT OBLIGATIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - OPERATING LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - SUPPLEMENTAL BALANCE SHEET INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - REVENUE RECOGNITION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - GOVERNMENT GRANTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - STOCK-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - EARNINGS (LOSS) PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - SEGMENT REPORTING (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - PUBLIC-PRIVATE PARTNERSHIP WITH U.S. DEPARTMENT OF WAR - Price Protection Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - PUBLIC-PRIVATE PARTNERSHIP WITH U.S. DEPARTMENT OF WAR - PPA Upfront Asset (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - CASH, CASH EQUIVALENTS AND INVESTMENTS - Amortized Costs, Unrealized Gains and Losses, and Estimated Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - CASH, CASH EQUIVALENTS AND INVESTMENTS - Amortized Costs, Unrealized Gains and Losses, and Estimated Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - CASH, CASH EQUIVALENTS AND INVESTMENTS - Debt Securities, Income and Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - CASH, CASH EQUIVALENTS AND INVESTMENTS - Schedule of Investments Classified by Contractual Maturity Date (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - INVENTORIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - PROPERTY, PLANT AND EQUIPMENT - Schedule Of Property, Plant and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - PROPERTY, PLANT AND EQUIPMENT - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - PROPERTY, PLANT AND EQUIPENT - Depreciation and Depletion Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - ASSET RETIREMENT AND ENVIRONMENTAL OBLIGATIONS (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - DEBT OBLIGATIONS - Schedule of Long-term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - DEBT OBLIGATIONS - Revolving Credit Facility (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - DEBT OBLIGATIONS - Convertible Notes (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - DEBT OBLIGATIONS - Capped Calls (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - DEBT OBLIGATIONS - Samarium Project Loan (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - DEBT OBLIGATIONS - Equipment Notes (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - DEBT OBLIGATIONS - Interest Expense, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - OPERATING LEASES - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - OPERATING LEASES - Supplemental Disclosure for the Consolidated Balance Sheets (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - REDEEMABLE PREFERRED STOCK (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - SUPPLEMENTAL BALANCE SHEET INFORMATION - Other Receivables (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - SUPPLEMENTAL BALANCE SHEET INFORMATION - Accrued Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - REVENUE RECOGNITION - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - REVENUE RECOGNITION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - REVENUE RECOGNITION - Contract Balances (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - GOVERNMENT GRANTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - GOVERNMENT GRANTS - Schedule of Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - GOVERNMENT GRANTS - Schedule of Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - STOCK-BASED COMPENSATION - Warrant (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - STOCK-BASED COMPENSATION - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Stock-Based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Stock-Based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Compensation Related Costs, Share Based Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Compensation Related Costs, Share Based Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Compensation Related Costs, Share Based Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Compensation Related Costs, Share Based Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - FAIR VALUE MEASUREMENTS - Valuation Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - FAIR VALUE MEASUREMENTS - Carrying Values and Estimated Fair Values (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - FAIR VALUE MEASUREMENTS - Derivative Instrument (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - EARNINGS (LOSS) PER SHARE - Schedule of Unweighted Potentially Dilutive Shares (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - EARNINGS (LOSS) PER SHARE - Calculation of Basic and Diluted Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - RELATED PARTY TRANSACTIONS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - SEGMENT REPORTING - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - SEGMENT REPORTING - Reconciliation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - SEGMENT REPORTING - Reconciliation of Adjusted EBITDA (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - SEGMENT REPORTING - Segment Reporting Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - SEGMENT REPORTING - Segment Reporting Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION (Details) link:presentationLink link:calculationLink link:definitionLink