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 Comprehensive Income (Loss) (Unaudited) link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) link:calculationLink link:definitionLink link:presentationLink 006 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 1 - Organization and Description of Business link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 2 - Basis of Presentation, Consolidation and Summary of Significant Accounting Policies link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 3 - Liquidity and Going Concern Analysis link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 4 - Discontinued Operations and Assets and Liabilities Held for Sale link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 5 - Digital Assets link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 6 - Written Covered Bitcoin Call Options link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 7 - Fair Value Measurements link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 8 - Convertible Notes, Embedded Derivatives and Pre-Funded Warrants link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 9 - Accounts Payable, Accrued Expenses and Other Liabilities link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 10 - Leases link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 11 - Income Taxes link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 12 - Stockholders' Equity link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note 13 - Net Income (Loss) Per Share link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Note 14 - Commitments and Contingencies link:calculationLink link:definitionLink link:presentationLink 021 - Disclosure - Note 15 - Related Party Transactions link:calculationLink link:definitionLink link:presentationLink 022 - 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 4 - Discontinued Operations and Assets and Liabilities Held for Sale (Tables) link:calculationLink link:definitionLink link:presentationLink 995447 - Disclosure - Note 5 - Digital Assets (Tables) link:calculationLink link:definitionLink link:presentationLink 995448 - Disclosure - Note 6 - Written Covered Bitcoin Call Options (Tables) link:calculationLink link:definitionLink link:presentationLink 995449 - Disclosure - Note 7 - Fair Value Measurements (Tables) link:calculationLink link:definitionLink link:presentationLink 995450 - Disclosure - Note 8 - Convertible Notes, Embedded Derivatives and Pre-Funded Warrants (Tables) link:calculationLink link:definitionLink link:presentationLink 995451 - Disclosure - Note 9 - Accounts Payable, Accrued Expenses and Other Liabilities (Tables) link:calculationLink link:definitionLink link:presentationLink 995452 - Disclosure - Note 10 - Leases (Tables) link:calculationLink link:definitionLink link:presentationLink 995453 - Disclosure - Note 12 - Stockholders' Equity (Tables) link:calculationLink link:definitionLink link:presentationLink 995454 - Disclosure - Note 13 - Net Income (Loss) Per Share (Tables) link:calculationLink link:definitionLink link:presentationLink 995455 - Disclosure - Note 3 - Liquidity and Going Concern Analysis (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995456 - Disclosure - Note 4 - Discontinued Operations and Assets and Liabilities Held for Sale (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995457 - Disclosure - Note 4 - Discontinued Operations and Assets and Liabilities Held for Sale - Schedule of Discontinued Operations (Details) link:calculationLink link:definitionLink link:presentationLink 995458 - Disclosure - Note 5 - Digital Assets (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995459 - Disclosure - Note 5 - Digital Assets - Schedule of Digital Assets (Details) link:calculationLink link:definitionLink link:presentationLink 995460 - Disclosure - Note 6 - Written Covered Bitcoin Call Options (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995461 - Disclosure - Note 6 - Written Covered Bitcoin Call Options - Schedule of Written Covered-call Derivatives (Details) link:calculationLink link:definitionLink link:presentationLink 995462 - Disclosure - Note 6 - Written Covered Bitcoin Call Options - Schedule of Written Covered-call Derivatives (Details) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 995463 - Disclosure - Note 7 - Fair Value Measurements (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995464 - Disclosure - Note 7 - Fair Value Measurements - Schedule of Instruments at Fair Value (Details) link:calculationLink link:definitionLink link:presentationLink 995465 - Disclosure - Note 7 - Fair Value Measurements - Schedule of Level 3 Derivatives (Details) link:calculationLink link:definitionLink link:presentationLink 995466 - Disclosure - Note 8 - Convertible Notes, Embedded Derivatives and Pre-Funded Warrants - Schedule of Convertible Debt (Details) link:calculationLink link:definitionLink link:presentationLink 995467 - Disclosure - Note 8 - Convertible Notes, Embedded Derivatives and Pre-Funded Warrants - Schedule of Debt and Other Financing Activities (Details) link:calculationLink link:definitionLink link:presentationLink 995468 - Disclosure - Note 9 - Accounts Payable, Accured Expenses and Other Liabilities - Schedule of Accounts Payable and Accrued Expenses (Details) link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Note 10 - Leases (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note 10 - Leases - Schedule of Lease Cost (Details) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Note 10 - Leases - Schedule of Operating Lease Liability Maturity (Details) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note 11 - Income Taxes (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note 12 - Stockholders' Equity (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note 12 - Stockholders' Equity - Schedule of Stock (Details) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note 13 - Net Income (Loss) Per Share - Summary of Earnings Per Share (Details) link:calculationLink link:definitionLink link:presentationLink