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 - Consolidated Statements of Comprehensive Income (Unaudited) link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Consolidated Statements of Cash Flows (Unaudited) link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Consolidated Statements of Stockholders' Equity (Unaudited) link:calculationLink link:definitionLink link:presentationLink 006 - Statement - Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note A - Basis of Presentation link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note B - Revenues link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note C - Earnings Per Share link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note D - Business Segments link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note E - Fair Value of Financial Instruments link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note F - Cash, Cash Equivalents And Marketable Securities link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note G - Other Assets link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note H - Leases link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note I - Commitments and Contingencies link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note J - Line of Credit link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note K - Impairment of Vendor Deposit link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note L - Gain on Sale of Property Plant and Equipment link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note M - Recently Issued or Adopted Accounting Pronouncements link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Note N - Subsequent Event link:calculationLink link:definitionLink link:presentationLink 995467 - Disclosure - Note D - Business Segments (Tables) link:calculationLink link:definitionLink link:presentationLink 995468 - Disclosure - Note F - Cash, Cash Equivalents And Marketable Securities (Tables) link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Note H - Leases (Tables) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note B - Revenues 1 (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Note B - Revenues 2 (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note D - Business Segments (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note D - Business Segments - Segment Information (Details) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note F - Cash, Cash Equivalents And Marketable Securities (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note F - Cash, Cash Equivalents And Marketable Securities - Summary of Marketable Securities (Details) link:calculationLink link:definitionLink link:presentationLink 995476 - Disclosure - Note G - Other Assets (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995477 - Disclosure - Note H - Leases (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995478 - Disclosure - Note H - Leases - Lease Cost (Details) link:calculationLink link:definitionLink link:presentationLink 995479 - Disclosure - Note H - Leases - Lease Maturities (Details) link:calculationLink link:definitionLink link:presentationLink 995480 - Disclosure - Note H - Leases - Operating Lease Income (Details) link:calculationLink link:definitionLink link:presentationLink 995481 - Disclosure - Note J - Line of Credit (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995482 - Disclosure - Note K - Impairment of Vendor Deposit (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995483 - Disclosure - Note L - Gain on Sale of Property Plant and Equipment (Details Textual) link:calculationLink link:definitionLink link:presentationLink