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 Stockholders' Equity (Deficit) (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 - Organization link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 2 - Summary of Significant Accounting Policies link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 3 - Fair Value Measurements link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 4 - Prepaid Expenses and Other Current Assets link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 5 - Digital Assets link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 6 - Accrued Liabilities link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 7 - Commitments and Contingencies link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 8 - Financing Activities link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 9 - Convertible Notes link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 10 - Common Stock Warrants and Warrant Liabilities link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 11 - Stockholders' Equity (Deficit) link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 12 - Stock-based Compensation link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 13 - Divestitures link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note 14 - Income Taxes link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Note 15 - Related Party Transactions link:calculationLink link:definitionLink link:presentationLink 021 - Disclosure - Note 16 - Subsequent Events link:calculationLink link:definitionLink link:presentationLink 995445 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:definitionLink link:presentationLink 995446 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Tables) link:calculationLink link:definitionLink link:presentationLink 995447 - Disclosure - Note 3 - Fair Value Measurements (Tables) link:calculationLink link:definitionLink link:presentationLink 995448 - Disclosure - Note 4 - Prepaid Expenses and Other Current Assets (Tables) link:calculationLink link:definitionLink link:presentationLink 995449 - Disclosure - Note 5 - Digital Assets (Tables) link:calculationLink link:definitionLink link:presentationLink 995450 - Disclosure - Note 6 - Accrued Liabilities (Tables) link:calculationLink link:definitionLink link:presentationLink 995451 - Disclosure - Note 7 - Commitments and Contingencies (Tables) link:calculationLink link:definitionLink link:presentationLink 995452 - Disclosure - Note 10 - Common Stock Warrants and Warrant Liabilities (Tables) link:calculationLink link:definitionLink link:presentationLink 995453 - Disclosure - Note 12 - Stock-based Compensation (Tables) link:calculationLink link:definitionLink link:presentationLink 995454 - Disclosure - Note 13 - Divestitures (Tables) link:calculationLink link:definitionLink link:presentationLink 995455 - Disclosure - Note 1 - Organization (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995456 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995457 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Schedule of Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents (Details) link:calculationLink link:definitionLink link:presentationLink 995458 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Schedule of Earnings Per Share, Basic and Diluted (Details) link:calculationLink link:definitionLink link:presentationLink 995459 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Outstanding Stock Warrants Excluded from the Diluted Net Loss Per Share Computation (Details) link:calculationLink link:definitionLink link:presentationLink 995460 - Disclosure - Note 3 - Fair Value Measurements (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995461 - Disclosure - Note 3 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) link:calculationLink link:definitionLink link:presentationLink 995462 - Disclosure - Note 4 - Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Details) link:calculationLink link:definitionLink link:presentationLink 995463 - Disclosure - Note 5 - Digital Assets (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995464 - Disclosure - Note 5 - Digital Assets - Crypto Asset, Holding (Details) link:calculationLink link:definitionLink link:presentationLink 995465 - Disclosure - Note 5 - Digital Assets - Crypto Asset, Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995466 - Disclosure - Note 6 - Accrued Liabilities - Summary of Accrued Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995467 - Disclosure - Note 7 - Commitments and Contingencies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995468 - Disclosure - Note 7 - Commitments and Contingencies - Lease Expense (Details) link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Note 8 - Financing Activities (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note 9 - Convertible Notes (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Note 10 - Common Stock Warrants and Warrant Liabilities (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note 10 - Common Stock Warrants and Warrant Liabilities - Schedule of Stockholders' Equity Note, Warrants or Rights (Details) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note 10 - Common Stock Warrants and Warrant Liabilities - Schedule of Stockholders' Equity Note, Warrants or Rights (Details) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note 10 - Common Stock Warrants and Warrant Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note 11 - Stockholders' Equity (Deficit) (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995476 - Disclosure - Note 12 - Stock-based Compensation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995477 - Disclosure - Note 12 - Stock-based Compensation - Schedule of Nonvested Restricted Stock Units Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995478 - Disclosure - Note 13 - Divestitures (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995479 - Disclosure - Note 13 - Divestitures - Discontinued Operations (Details) link:calculationLink link:definitionLink link:presentationLink 995480 - Disclosure - Note 14 - Income Taxes (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995481 - Disclosure - Note 15 - Related Party Transactions (Details Textual) link:calculationLink link:definitionLink link:presentationLink