000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Condensed Consolidated Statements of Operations (Unaudited) link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) link:calculationLink link:definitionLink link:presentationLink 006 - Disclosure - Note 1 - Summary of Significant Accounting Policies link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 2 - Acquisition of Hexas Biomass Inc. link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 3 - Investments link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 4 - Notes Receivable and Advances link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 5 - Properties, Plant and Equipment, Net and Mineral Rights link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 6 - Intangible Assets and Goodwill link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 7 - Accrued Expenses and Other Liabilities - Current link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 8 - Leases link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 9 - Commitments and Contingencies link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 10 - Equity link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 11 - Stock-based Compensation link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 12 - Fair Value Measurements link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 13 - Deferred Revenue link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note 14 - Net Income (Loss) Per Common Share link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Note 15 - Segment Reporting link:calculationLink link:definitionLink link:presentationLink 021 - Disclosure - Note 16 - Related Party Transactions link:calculationLink link:definitionLink link:presentationLink 995468 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Note 2 - Acquisition of Hexas Biomass Inc. (Tables) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note 3 - Investments (Tables) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Note 4 - Notes Receivable and Advances (Tables) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note 5 - Properties, Plant and Equipment, Net and Mineral Rights (Tables) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note 6 - Intangible Assets and Goodwill (Tables) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note 7 - Accrued Expenses and Other Liabilities - Current (Tables) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note 8 - Leases (Tables) link:calculationLink link:definitionLink link:presentationLink 995476 - Disclosure - Note 9 - Commitments and Contingencies (Tables) link:calculationLink link:definitionLink link:presentationLink 995477 - Disclosure - Note 10 - Equity (Tables) link:calculationLink link:definitionLink link:presentationLink 995478 - Disclosure - Note 11 - Stock-based Compensation (Tables) link:calculationLink link:definitionLink link:presentationLink 995479 - Disclosure - Note 12 - Fair Value Measurements (Tables) link:calculationLink link:definitionLink link:presentationLink 995480 - Disclosure - Note 13 - Deferred Revenue (Tables) link:calculationLink link:definitionLink link:presentationLink 995481 - Disclosure - Note 15 - Segment Reporting (Tables) link:calculationLink link:definitionLink link:presentationLink 995482 - Disclosure - Note 16 - Related Party Transactions (Tables) link:calculationLink link:definitionLink link:presentationLink 995483 - Disclosure - Note 1 - Summary of Significant Accounting Policies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995484 - Disclosure - Note 2 - Acquisition of Hexas Biomass Inc. (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995485 - Disclosure - Note 2 - Acquisition of Hexas Biomass Inc. - Schedule of Pro Forma Information (Details) link:calculationLink link:definitionLink link:presentationLink 995486 - Disclosure - Note 3 - Investments (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995487 - Disclosure - Note 3 - Investments - Summary of Investments (Details) link:calculationLink link:definitionLink link:presentationLink 995488 - Disclosure - Note 3 - Investments - Summary of Financial Information for Equity Method Investments (Details) link:calculationLink link:definitionLink link:presentationLink 995489 - Disclosure - Note 4 - Notes Receivable and Advances (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995490 - Disclosure - Note 4 - Notes Receivable and Advances - Total Notes Receivable (Details) link:calculationLink link:definitionLink link:presentationLink 995491 - Disclosure - Note 5 - Properties, Plant and Equipment, Net and Mineral Rights (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995492 - Disclosure - Note 5 - Properties, Plant and Equipment, Net and Mineral Rights - Property, Plant and Equipment (Details) link:calculationLink link:definitionLink link:presentationLink 995493 - Disclosure - Note 5 - Properties, Plant and Equipment, Net and Mineral Rights - Mineral Rights and Properties (Details) link:calculationLink link:definitionLink link:presentationLink 995494 - Disclosure - Note 5 - Properties, Plant and Equipment, Net and Mineral Rights - Assets Held for Sale (Details) link:calculationLink link:definitionLink link:presentationLink 995495 - Disclosure - Note 5 - Properties, Plant and Equipment, Net and Mineral Rights - Liabilities Held for Sale (Details) link:calculationLink link:definitionLink link:presentationLink 995496 - Disclosure - Note 6 - Intangible Assets and Goodwill (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995497 - Disclosure - Note 6 - Intangible Assets and Goodwill - Intangible Assets (Details) link:calculationLink link:definitionLink link:presentationLink 995498 - Disclosure - Note 6 - Intangible Assets and Goodwill - Accumulated Amortization (Details) link:calculationLink link:definitionLink link:presentationLink 995499 - Disclosure - Note 6 - Intangible Assets and Goodwill - Future Amortization Expense (Details) link:calculationLink link:definitionLink link:presentationLink 995500 - Disclosure - Note 6 - Intangible Assets and Goodwill - Changes in Intangible Assets and Goodwill (Details) link:calculationLink link:definitionLink link:presentationLink 995501 - Disclosure - Note 7 - Accrued Expenses and Other Liabilities - Current (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995502 - Disclosure - Note 7 - Accrued Expenses and Other Liabilities - Current - Accrued Expenses and Other Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995503 - Disclosure - Note 8 - Leases (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995504 - Disclosure - Note 8 - Leases - Lease Cost (Details) link:calculationLink link:definitionLink link:presentationLink 995505 - Disclosure - Note 8 - Leases - Minimum Lease Payments to Be Paid (Details) link:calculationLink link:definitionLink link:presentationLink 995506 - Disclosure - Note 9 - Commitments and Contingencies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995507 - Disclosure - Note 9 - Commitments and Contingencies - Schedule of Other Commitments (Details) link:calculationLink link:definitionLink link:presentationLink 995508 - Disclosure - Note 10 - Equity (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995509 - Disclosure - Note 10 - Equity - Common Shares Issued (Details) link:calculationLink link:definitionLink link:presentationLink 995510 - Disclosure - Note 10 - Equity - Outstanding Warrants (Details) link:calculationLink link:definitionLink link:presentationLink 995511 - Disclosure - Note 11 - Stock-based Compensation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995512 - Disclosure - Note 11 - Stock-based Compensation - RSU Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995513 - Disclosure - Note 11 - Stock-based Compensation - PSU Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995514 - Disclosure - Note 11 - Stock-based Compensation - Fair Value Assumptions of PSUs (Details) link:calculationLink link:definitionLink link:presentationLink 995515 - Disclosure - Note 12 - Fair Value Measurements (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995516 - Disclosure - Note 12 - Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) link:calculationLink link:definitionLink link:presentationLink 995517 - Disclosure - Note 12 - Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 995518 - Disclosure - Note 12 - Fair Value Measurements - Changes in Derivative Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995519 - Disclosure - Note 12 - Fair Value Measurements - Range of Variables to Calculate Fair Value (Details) link:calculationLink link:definitionLink link:presentationLink 995520 - Disclosure - Note 13 - Deferred Revenue (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995521 - Disclosure - Note 13 - Deferred Revenue - Deferred Revenue Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995522 - Disclosure - Note 13 - Deferred Revenue - Balances (Details) link:calculationLink link:definitionLink link:presentationLink 995523 - Disclosure - Note 15 - Segment Reporting (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995524 - Disclosure - Note 15 - Segment Reporting - Reconciliation of Revenue (Details) link:calculationLink link:definitionLink link:presentationLink 995525 - Disclosure - Note 15 - Segment Reporting - Summarized Financial Information (Details) link:calculationLink link:definitionLink link:presentationLink 995526 - Disclosure - Note 16 - Related Party Transactions (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995527 - Disclosure - Note 16 - Related Party Transactions - Related Party Payable (Details) link:calculationLink link:definitionLink link:presentationLink