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Cover
Document and Entity Information
Financial Statements
CONSOLIDATED BALANCE SHEETS
CONSOLIDATED BALANCE SHEETS (Parenthetical)
CONSOLIDATED STATEMENTS OF OPERATIONS
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (PARENTHETICAL)
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
CONSOLIDATED STATEMENTS OF CASH FLOWS
CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)
Notes to Financial Statements
Summary of Significant Accounting Policies
Asset Impairments, Other Charges, and Inventory Valuation Provision
Acquisitions and Divestitures
Restricted Cash
Investments
Fair Value Measurements
Other Receivables
Land, Property and Equipment
Investments in Other Entities and Noncontrolling Interest in a Subsidiary
Accrued Liabilities
Debt
Stockholders' Equity
Income Taxes
Commitments and Contingencies
Capitalized Lease Obligation and Receivables
401(k) Plan
Reportable Segments and Geographic Information
Concentrations
Subsequent Events
Schedule II: Valuation and Qualifying Accounts
Accounting Policies
Summary of Significant Accounting Policies (Policies)
Notes Tables
Summary of Significant Accounting Policies (Tables)
Asset Impairments, Other Charges, and Inventory Valuation Provision (Tables)
Restricted Cash (Tables)
Investments (Tables)
Fair Value Measurements (Tables)
Other Receivables (Tables)
Land, Property and Equipment (Tables)
Accrued Liabilities (Tables)
Debt (Tables)
Stockholders' Equity (Tables)
Income Taxes (Tables)
Commitments and Contingencies (Tables)
Capitalized Lease Obligation and Receivables (Tables)
Reportable Segments and Geographic Information (Tables)
Notes Details
Summary of Significant Accounting Policies - Reclassifications (Details)
Summary of Significant Accounting Policies - Inventory (Details)
Summary of Significant Accounting Policies - Property and Equipment (Details)
Summary of Significant Accounting Policies - Long-Lived Assets (Details)
Summary of Significant Accounting Policies - Goodwill (Details)
Summary of Significant Accounting Policies - Revenue Recognition (Details)
Summary of Significant Accounting Policies - Alternative Fuels Excise Tax Credit (Details)
Summary of Significant Accounting Policies - Advertising Costs (Details)
Summary of Significant Accounting Policies - Net Loss Per Share (Details)
Summary of Significant Accounting Policies - Foreign Currency Translation (Details)
Summary of Significant Accounting Policies - Concentration of Credit Risk (Details)
Summary of Significant Accounting Policies - Recently Adopted Accounting Changes and Recently Issued Accounting Standards (Details)
Asset Impairments, Other Charges, and Inventory Valuation Provision - Summary of Charges (Details)
Asset Impairments, Other Charges, and Inventory Valuation Provision (Details)
Asset Impairments, Other Charges, and Inventory Valuation Provision - Cash Charges (Details)
Acquisitions and Divestitures - BP Transaction (Details)
Acquisitions and Divestitures - SAFE&CEC S.r.l. (Details)
Restricted Cash (Details)
Investments (Details)
Fair Value Measurements (Details)
Fair Value Measurements - Fair Value Recognition (Details)
Other Receivables (Details)
Land, Property and Equipment (Details)
Investments in Other Entities and Noncontrolling Interest in a Subsidiary (Details)
Accrued Liabilities (Details)
Debt - Debt and Capital Lease Obligations (Details)
Debt - 7.5% Notes (Details)
Debt - SLG Notes (Details)
Debt - 5.25% (Details)
Debt - PlainsCapital Bank Credit Facility (Details)
Debt - Canton Bonds and Other Debt (Details)
Debt - NG Advantage Debt (Details)
Debt - Termination of GE Credit Agreement (Details)
Stockholders' Equity (Details)
Stockholders' Equity - Issuance of Common Stock and Warrants (Details)
Stockholders' Equity - Stock-Based Compensation (Details)
Stockholders' Equity - Restricted Stock Units (Details)
Stockholders' Equity - Employee Stock Purchase Plan (Details)
Stockholders' Equity - Non-Qualified Non-Public Subsidiary Unit Options (Details)
Income Taxes (Details)
Income Taxes - Tax Credit Carryforwards (Details)
Income Taxes - Unrecognized Tax Benefits (Details)
Commitments and Contingencies (Details)
Commitments and Contingencies - Long-Term Take-or-Pay Natural Gas Supply Contracts (Details)
Commitments and Contingencies - Long-Term Natural Gas Purchase Contracts (Details)
Commitments and Contingencies - Purchase of Natural Gas Heavy-Duty Trucks (Details)
Capitalized Lease Obligation and Receivables (Details)
Capitalized Lease Obligation and Receivables - Future Receipts (Details)
401(k) Plan (Details)
Reportable Segments and Geographic Information (Details)
Subsequent Events (Details)
Schedule II: Valuation and Qualifying Accounts (Details)
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