2.4.0.6 Html 115 220 1 false 30 0 false 7 false false R1.htm 00 - Document - Document and Entity Information Sheet http://national.edu/role/DocumentAndEntityInformation Document and Entity Information true false R2.htm 0110 - Statement - Condensed Consolidated Balance Sheet (Unaudited) Sheet http://national.edu/role/BalanceSheets Condensed Consolidated Balance Sheet (Unaudited) false false R3.htm 0111 - Statement - Condensed Consolidated Balance Sheet (Unaudited) (Parenthetical) Sheet http://national.edu/role/BalanceSheetsParenthetical Condensed Consolidated Balance Sheet (Unaudited) (Parenthetical) false false R4.htm 0120 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) Sheet http://national.edu/role/StatementsOfOperationsAndComprehensiveIncome Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) false false R5.htm 0130 - Statement - Condensed Consolidated Statements of Stockholders' Equity (Unaudited) Sheet http://national.edu/role/StatementsOfStockholdersEquity Condensed Consolidated Statements of Stockholders' Equity (Unaudited) false false R6.htm 0131 - Statement - Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) Sheet http://national.edu/role/StatementsOfStockholdersEquityParenthetical Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) false false R7.htm 0140 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) Sheet http://national.edu/role/StatementsOfCashFlows Condensed Consolidated Statements of Cash Flows (Unaudited) false false R8.htm 0201 - Disclosure - Statement Presentation and Basis of Consolidation Sheet http://national.edu/role/StatementPresentationAndBasisOfConsolidation Statement Presentation and Basis of Consolidation false false R9.htm 0202 - Disclosure - Nature of Operations Sheet http://national.edu/role/NatureOfOperations Nature of Operations false false R10.htm 0203 - Disclosure - Earnings Per Share Sheet http://national.edu/role/EarningsPerShare Earnings Per Share false false R11.htm 0204 - Disclosure - Recently Adopted and New Accounting Pronouncements Sheet http://national.edu/role/RecentlyAdoptedAndNewAccountingPronouncements Recently Adopted and New Accounting Pronouncements false false R12.htm 0205 - Disclosure - Stockholders' Equity Sheet http://national.edu/role/StockholdersEquity Stockholders' Equity false false R13.htm 0206 - Disclosure - Commitments and Contingencies Sheet http://national.edu/role/CommitmentsAndContingencies Commitments and Contingencies false false R14.htm 0207 - Disclosure - Condominium Project Sheet http://national.edu/role/CondominiumProject Condominium Project false false R15.htm 0208 - Disclosure - Fair Value Measurements Sheet http://national.edu/role/FairValueMeasurements Fair Value Measurements false false R16.htm 0209 - Disclosure - Segment Reporting Sheet http://national.edu/role/SegmentReporting Segment Reporting false false R17.htm 0210 - Disclosure - Subsequent Events Sheet http://national.edu/role/SubsequentEvents Subsequent Events false false R18.htm 0401 - Disclosure - Statement Presentation and Basis of Consolidation (Policies) Sheet http://national.edu/role/StatementPresentationAndBasisOfConsolidationPolicies Statement Presentation and Basis of Consolidation (Policies) false false R19.htm 0503 - Disclosure - Earnings Per Share (Tables) Sheet http://national.edu/role/EarningsPerShareTables Earnings Per Share (Tables) false false R20.htm 0505 - Disclosure - Stockholders' Equity (Tables) Sheet http://national.edu/role/StockholdersEquityTables Stockholders' Equity (Tables) false false R21.htm 0506 - Disclosure - Commitments and Contingencies (Tables) Sheet http://national.edu/role/CommitmentsAndContingenciesTables Commitments and Contingencies (Tables) false false R22.htm 0508 - Disclosure - Fair Value Measurements (Tables) Sheet http://national.edu/role/FairValueMeasurementsTables Fair Value Measurements (Tables) false false R23.htm 0509 - Disclosure - Segment Reporting (Tables) Sheet http://national.edu/role/SegmentReportingTables Segment Reporting (Tables) false false R24.htm 0602 - Disclosure - Nature of Operations (Details Textual) Sheet http://national.edu/role/NatureOfOperationsDetailsTextual Nature of Operations (Details Textual) false false R25.htm 0603 - Disclosure - Earnings Per Share (Details) Sheet http://national.edu/role/EarningsPerShareDetails Earnings Per Share (Details) false false R26.htm 06031 - Disclosure - Earnings Per Share (Details Textual) Sheet http://national.edu/role/EarningsPerShareDetailsTextual Earnings Per Share (Details Textual) false false R27.htm 0605 - Disclosure - Stockholders Equity (Details) Sheet http://national.edu/role/StockholdersEquityDetails Stockholders Equity (Details) false false R28.htm 06051 - Disclosure - Stockholders Equity (Details 1) Sheet http://national.edu/role/StockholdersEquityDetails1 Stockholders Equity (Details 1) false false R29.htm 06052 - Disclosure - Stockholders' Equity (Details 2) Sheet http://national.edu/role/StockholdersEquityDetails2 Stockholders' Equity (Details 2) false false R30.htm 06053 - Disclosure - Stockholders' Equity (Details 3) Sheet http://national.edu/role/StockholdersEquityDetails3 Stockholders' Equity (Details 3) false false R31.htm 06054 - Disclosure - Stockholders Equity (Details Textual) Sheet http://national.edu/role/StockholdersEquityDetailsTextual Stockholders Equity (Details Textual) false false R32.htm 0606 - Disclosure - Commitments and Contingencies (Details) Sheet http://national.edu/role/CommitmentsAndContingenciesDetails Commitments and Contingencies (Details) false false R33.htm 06061 - Disclosure - Commitments and Contingencies (Details Textual) Sheet http://national.edu/role/CommitmentsAndContingenciesDetailsTextual Commitments and Contingencies (Details Textual) false false R34.htm 0607 - Disclosure - Condominium Project (Details Textual) Sheet http://national.edu/role/CondominiumProjectDetailsTextual Condominium Project (Details Textual) false false R35.htm 0608 - Disclosure - Fair Value Measurements (Details) Sheet http://national.edu/role/FairValueMeasurementsDetails Fair Value Measurements (Details) false false R36.htm 0609 - Disclosure - Segment Reporting (Details) Sheet http://national.edu/role/SegmentReportingDetails Segment Reporting (Details) false false R37.htm 06091 - Disclosure - Segment Reporting (Details Textual) Sheet http://national.edu/role/SegmentReportingDetailsTextual Segment Reporting (Details Textual) false false All Reports Book All Reports 'Monetary' elements on report '06054 - Disclosure - Stockholders Equity (Details Textual)' had a mix of different decimal attribute values. 'Monetary' elements on report '06061 - Disclosure - Commitments and Contingencies (Details Textual)' had a mix of different decimal attribute values. Process Flow-Through: 0110 - Statement - Condensed Consolidated Balance Sheet (Unaudited) Process Flow-Through: Removing column 'Aug. 31, 2011' Process Flow-Through: Removing column 'May 31, 2011' Process Flow-Through: 0111 - Statement - Condensed Consolidated Balance Sheet (Unaudited) (Parenthetical) Process Flow-Through: Removing column 'Aug. 27, 2012' Process Flow-Through: Removing column 'Aug. 29, 2011' Process Flow-Through: 0120 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) Process Flow-Through: 0131 - Statement - Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) Process Flow-Through: 0140 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) nauh-20120831.xml nauh-20120831.xsd nauh-20120831_cal.xml nauh-20120831_def.xml nauh-20120831_lab.xml nauh-20120831_pre.xml true true