0211 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 0210 - Disclosure - Treasury Stock link:presentationLink link:calculationLink link:definitionLink 0120 - Statement - Statements of Comprehensive Income (Unaudited) link:presentationLink link:calculationLink link:definitionLink 0141 - Statement - Statement of Stockholders' Equity (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0140 - Statement - Statement of Stockholders' Equity (Unaudited) link:presentationLink link:calculationLink link:definitionLink 00 - Document - Document and Entity Information link:presentationLink link:definitionLink link:calculationLink 0110 - Statement - Income Statements (Unaudited) link:presentationLink link:definitionLink link:calculationLink 0111 - Statement - Income Statements (Unaudited) (Parenthetical) link:presentationLink link:definitionLink link:calculationLink 0130 - Statement - Balance Sheets link:presentationLink link:definitionLink link:calculationLink 0131 - Statement - Balance Sheets (Parenthetical) link:presentationLink link:definitionLink link:calculationLink 0150 - Statement - Statements of Cash Flows (Unaudited) link:presentationLink link:definitionLink link:calculationLink 0201 - Disclosure - Nature of Business link:presentationLink link:definitionLink link:calculationLink 0202 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:definitionLink link:calculationLink 0203 - Disclosure - Net Income Per Common Share link:presentationLink link:definitionLink link:calculationLink 0204 - Disclosure - Valuation and Qualifying Accounts link:presentationLink link:definitionLink link:calculationLink 0205 - Disclosure - Property and Equipment link:presentationLink link:definitionLink link:calculationLink 0206 - Disclosure - Commitments and Contingencies link:presentationLink link:definitionLink link:calculationLink 0207 - Disclosure - Income Taxes link:presentationLink link:definitionLink link:calculationLink 0208 - Disclosure - Share-Based Compensation link:presentationLink link:definitionLink link:calculationLink 0209 - Disclosure - Regulatory link:presentationLink link:definitionLink link:calculationLink