000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Condensed Balance Sheets (Current Period Unaudited) link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Condensed Balance Sheets (Current Period Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Condensed Statements of Operations and Comprehensive Income (Loss) (Unaudited) link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Condensed Statements of Stockholders' Equity (Unaudited) link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Condensed Statements of Cash Flows (Unaudited) link:calculationLink link:definitionLink link:presentationLink 006 - Disclosure - Note 1 - Nature of Business 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 - Future Application of Accounting Standards link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 4 - Use of Estimates link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 5 - Marketable Securities link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 6 - Fair value of Marketable Securities link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 7 - Net Income (Loss) Per Common and Common Equivalent Share link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 8 - Commitments & Contingencies link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 9 - Share-based Payments link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 10 - Inventories link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 11 - Accrued Expenses link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 12 - Revolving Line of Credit link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 13 - Income Taxes link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note 14 - Enactment of the One Big Beautiful Bill Act link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Note 15 - Segment Reporting link:calculationLink link:definitionLink link:presentationLink 995445 - Disclosure - Note 6 - Fair value of Marketable Securities (Tables) link:calculationLink link:definitionLink link:presentationLink 995446 - Disclosure - Note 7 - Net Income (Loss) Per Common and Common Equivalent Share (Tables) link:calculationLink link:definitionLink link:presentationLink 995447 - Disclosure - Note 8 - Commitments & Contingencies (Tables) link:calculationLink link:definitionLink link:presentationLink 995448 - Disclosure - Note 10 - Inventories (Tables) link:calculationLink link:definitionLink link:presentationLink 995449 - Disclosure - Note 11 - Accrued Expenses (Tables) link:calculationLink link:definitionLink link:presentationLink 995450 - Disclosure - Note 14 - Enactment of the One Big Beautiful Bill Act (Tables) link:calculationLink link:definitionLink link:presentationLink 995451 - Disclosure - Note 15 - Segment Reporting (Tables) link:calculationLink link:definitionLink link:presentationLink 995452 - Disclosure - Note 6 - Fair value of Marketable Securities (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995453 - Disclosure - Note 6 - Fair Value of Marketable Securities - Marketable Securities Purchased (Details) link:calculationLink link:definitionLink link:presentationLink 995454 - Disclosure - Note 7 - Net Income (Loss) Per Common and Common Equivalent Share (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995455 - Disclosure - Note 7 - Net Income (Loss) Per Common and Common Equivalent Share - Table of Both Basic and Diluted EPS (Details) link:calculationLink link:definitionLink link:presentationLink 995456 - Disclosure - Note 8 - Commitments & Contingencies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995457 - Disclosure - Note 8 - Commitments & Contingencies - Maturity of Capitalized Lease Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995458 - Disclosure - Note 9 - Share-based Payments (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995459 - Disclosure - Note 10 - Inventories - Inventories (Details) link:calculationLink link:definitionLink link:presentationLink 995460 - Disclosure - Note 11 - Accrued Expenses - Accrued Expenses (Details) link:calculationLink link:definitionLink link:presentationLink 995461 - Disclosure - Note 12 - Revolving Line of Credit (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995462 - Disclosure - Note 13 - Income Taxes (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995463 - Disclosure - Note 14 - Enactment of the One Big Beautiful Bill Act (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995464 - Disclosure - Note 14 - Enactment of the One Big Beautiful Bill Act - Modifications to FDII Expenses (Details) link:calculationLink link:definitionLink link:presentationLink 995465 - Disclosure - Note 15 - Segment Reporting (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995466 - Disclosure - Note 15 - Segment Information - Schedule of Segment Information (Details) link:calculationLink link:definitionLink link:presentationLink