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 (Unaudited) link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Condensed Consolidated Statements of Changes in Stockholders' 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 - Basis of Presentation link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 2 - Use of Estimates and Uncertainties link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 3 - Revenue Recognition link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 4 - Accounts Receivable, Transit Accounts Receivable and and Transit Accounts Payable link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 5 - Property and Equipment link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 6 - Acquisitions and Divestitures link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 7 - Goodwill link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 8 - Revolving Credit Facility link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 9 - Per Share Data link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 10 - Share-based Compensation link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 11 - Treasury Stock and Retired Share Transactions link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 12 - New Accounting Standards and Updates link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note 13 - Segment Information link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Note 14 - Income Taxes link:calculationLink link:definitionLink link:presentationLink 021 - Disclosure - Note 15 - Contingencies link:calculationLink link:definitionLink link:presentationLink 022 - Disclosure - Note 16 - Leases link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Note 3 - Revenue Recognition (Tables) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note 4 - Accounts Receivable, Transit Accounts Receivable and and Transit Accounts Payable (Tables) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Note 5 - Property and Equipment (Tables) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note 7 - Goodwill (Tables) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note 9 - Per Share Data (Tables) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note 10 - Share-based Compensation (Tables) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note 13 - Segment Information (Tables) link:calculationLink link:definitionLink link:presentationLink 995476 - Disclosure - Note 16 - Leases (Tables) link:calculationLink link:definitionLink link:presentationLink 995477 - Disclosure - Note 3 - Revenue Recognition (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995478 - Disclosure - Note 3 - Revenue Recognition - Revenues Disaggregated by Revenue Source (Details) link:calculationLink link:definitionLink link:presentationLink 995479 - Disclosure - Note 4 - Accounts Receivable, Transit Accounts Receivable and and Transit Accounts Payable (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995480 - Disclosure - Note 4 - Accounts Receivable, Transit Accounts Receivable and and Transit Accounts Payable - Accounts Receivable (Details) link:calculationLink link:definitionLink link:presentationLink 995481 - Disclosure - Note 5 - Property and Equipment (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995482 - Disclosure - Note 5 - Property and Equipment - Summary of Property and Equipment (Details) link:calculationLink link:definitionLink link:presentationLink 995483 - Disclosure - Note 7 - Goodwill (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995484 - Disclosure - Note 7 - Goodwill - Changes in Carrying Amount of Goodwill (Details) link:calculationLink link:definitionLink link:presentationLink 995485 - Disclosure - Note 8 - Revolving Credit Facility (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995486 - Disclosure - Note 9 - Per Share Data (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995487 - Disclosure - Note 9 - Per Share Data - Weighted Average Number of Common Shares (Details) link:calculationLink link:definitionLink link:presentationLink 995488 - Disclosure - Note 9 - Per Share Data - Unissued Shares of Common Stock Were Reserved for the Following Purposes (Details) link:calculationLink link:definitionLink link:presentationLink 995489 - Disclosure - Note 10 - Share-based Compensation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995490 - Disclosure - Note 10 - Share-based Compensation - Restricted Stock Units Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995491 - Disclosure - Note 11 - Treasury Stock and Retired Share Transactions (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995492 - Disclosure - Note 13 - Segment Information (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995493 - Disclosure - Note 13 - Segment Information - Results of the Segments (Details) link:calculationLink link:definitionLink link:presentationLink 995494 - Disclosure - Note 13 - Segment Information - Revenues by Geographic Area (Details) link:calculationLink link:definitionLink link:presentationLink 995495 - Disclosure - Note 13 - Segment Information - Total Assets by Geographic Area (Details) link:calculationLink link:definitionLink link:presentationLink 995496 - Disclosure - Note 14 - Income Taxes (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995497 - Disclosure - Note 15 - Contingencies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995498 - Disclosure - Note 16 - Leases - Lease Expense (Details) link:calculationLink link:definitionLink link:presentationLink 995499 - Disclosure - Note 16 - Leases - Cash Flow Information (Details) link:calculationLink link:definitionLink link:presentationLink 995500 - Disclosure - Note 16 - Leases - Balance Sheet Information (Details) link:calculationLink link:definitionLink link:presentationLink 995501 - Disclosure - Note 16 - Leases - Balance Sheet Information (Details) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 995502 - Disclosure - Note 16 - Leases - Maturities of Lease Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink