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taxes.","units":{"USD":[{"end":"2012-08-31","val":10494000,"accn":"0001193125-12-416640","fy":2013,"fp":"Q1","form":"10-Q","filed":"2012-10-05","frame":"CY2012Q3I"},{"end":"2013-05-31","val":10460000,"accn":"0001193125-13-317482","fy":2013,"fp":"FY","form":"10-K","filed":"2013-08-02","frame":"CY2013Q2I"},{"end":"2013-11-30","val":12394000,"accn":"0001193125-14-007546","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-01-10","frame":"CY2013Q4I"},{"end":"2014-02-28","val":12349000,"accn":"0001193125-14-131535","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-04-04","frame":"CY2014Q1I"},{"end":"2014-05-31","val":12303000,"accn":"0001193125-14-302691","fy":2014,"fp":"FY","form":"10-K","filed":"2014-08-08","frame":"CY2014Q2I"},{"end":"2015-05-31","val":12097000,"accn":"0001354488-15-003634","fy":2015,"fp":"FY","form":"10-K","filed":"2015-08-07"},{"end":"2015-05-31","val":12097000,"accn":"0001654954-16-001234","fy":2016,"fp":"FY","form":"10-K","filed":"2016-08-05"},{"end":"2015-05-31","val":12097000,"accn":"0001654954-16-002161","fy":2016,"fp":"FY","form":"10-K/A","filed":"2016-09-13"},{"end":"2015-05-31","val":12097000,"accn":"0001654954-17-001714","fy":2016,"fp":"FY","form":"10-K/A","filed":"2017-03-06","frame":"CY2015Q2I"},{"end":"2016-05-31","val":11852000,"accn":"0001654954-16-001234","fy":2016,"fp":"FY","form":"10-K","filed":"2016-08-05"},{"end":"2016-05-31","val":11852000,"accn":"0001654954-16-002161","fy":2016,"fp":"FY","form":"10-K/A","filed":"2016-09-13"},{"end":"2016-05-31","val":11852000,"accn":"0001654954-17-001714","fy":2016,"fp":"FY","form":"10-K/A","filed":"2017-03-06"},{"end":"2016-05-31","val":11852000,"accn":"0001654954-17-006965","fy":2017,"fp":"FY","form":"10-K","filed":"2017-08-04","frame":"CY2016Q2I"},{"end":"2017-05-31","val":11568000,"accn":"0001654954-17-006965","fy":2017,"fp":"FY","form":"10-K","filed":"2017-08-04"},{"end":"2017-05-31","val":11600000,"accn":"0001654954-18-010162","fy":2018,"fp":"FY","form":"10-K","filed":"2018-09-14","frame":"CY2017Q2I"},{"end":"2018-05-31","val":11237000,"accn":"0001654954-18-010162","fy":2018,"fp":"FY","form":"10-K","filed":"2018-09-14"},{"end":"2018-05-31","val":11237000,"accn":"0001654954-19-010917","fy":2019,"fp":"FY","form":"10-K","filed":"2019-09-19","frame":"CY2018Q2I"},{"end":"2019-05-31","val":10857000,"accn":"0001654954-19-010917","fy":2019,"fp":"FY","form":"10-K","filed":"2019-09-19","frame":"CY2019Q2I"}]}},"CapitalLeasesFutureMinimumPaymentsRemainderOfFiscalYear":{"label":"Capital 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Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2012-08-31","val":791000,"accn":"0001193125-12-416640","fy":2013,"fp":"Q1","form":"10-Q","filed":"2012-10-05","frame":"CY2012Q3I"}]}},"CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation":{"label":"Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation","description":"The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.","units":{"USD":[{"end":"2012-05-31","val":309000,"accn":"0001193125-14-302691","fy":2014,"fp":"FY","form":"10-K","filed":"2014-08-08","frame":"CY2012Q2I"},{"end":"2013-05-31","val":839000,"accn":"0001193125-14-302691","fy":2014,"fp":"FY","form":"10-K","filed":"2014-08-08","frame":"CY2013Q2I"},{"end":"2014-05-31","val":1369000,"accn":"0001193125-14-302691","fy":2014,"fp":"FY","form":"10-K","filed":"2014-08-08"},{"end":"2014-05-31","val":1369000,"accn":"0001354488-15-003634","fy":2015,"fp":"FY","form":"10-K","filed":"2015-08-07","frame":"CY2014Q2I"},{"end":"2015-05-31","val":1899000,"accn":"0001354488-15-003634","fy":2015,"fp":"FY","form":"10-K","filed":"2015-08-07"},{"end":"2015-05-31","val":1899000,"accn":"0001654954-16-001234","fy":2016,"fp":"FY","form":"10-K","filed":"2016-08-05"},{"end":"2015-05-31","val":1899000,"accn":"0001654954-16-002161","fy":2016,"fp":"FY","form":"10-K/A","filed":"2016-09-13"},{"end":"2015-05-31","val":1899000,"accn":"0001654954-17-001714","fy":2016,"fp":"FY","form":"10-K/A","filed":"2017-03-06","frame":"CY2015Q2I"},{"end":"2016-05-31","val":2429000,"accn":"0001654954-16-001234","fy":2016,"fp":"FY","form":"10-K","filed":"2016-08-05"},{"end":"2016-05-31","val":2429000,"accn":"0001654954-16-002161","fy":2016,"fp":"FY","form":"10-K/A","filed":"2016-09-13"},{"end":"2016-05-31","val":2429000,"accn":"0001654954-17-001714","fy":2016,"fp":"FY","form":"10-K/A","filed":"2017-03-06"},{"end":"2016-05-31","val":2429000,"accn":"0001654954-17-006965","fy":2017,"fp":"FY","form":"10-K","filed":"2017-08-04","frame":"CY2016Q2I"},{"end":"2017-05-31","val":2959000,"accn":"0001654954-17-006965","fy":2017,"fp":"FY","form":"10-K","filed":"2017-08-04"},{"end":"2017-05-31","val":2959000,"accn":"0001654954-18-010162","fy":2018,"fp":"FY","form":"10-K","filed":"2018-09-14","frame":"CY2017Q2I"},{"end":"2018-05-31","val":3489000,"accn":"0001654954-18-010162","fy":2018,"fp":"FY","form":"10-K","filed":"2018-09-14"},{"end":"2018-05-31","val":3489000,"accn":"0001654954-19-010917","fy":2019,"fp":"FY","form":"10-K","filed":"2019-09-19","frame":"CY2018Q2I"},{"end":"2019-05-31","val":4019000,"accn":"0001654954-19-010917","fy":2019,"fp":"FY","form":"10-K","filed":"2019-09-19","frame":"CY2019Q2I"}]}},"CapitalLeasesLesseeBalanceSheetAssetsByMajorClassPropertyPlantAndEquipmentOtherAccumulatedDepreciation":{"label":"Capital Leases, Lessee Balance Sheet, Assets by Major Class, Property, Plant, and Equipment Other, Accumulated Depreciation","description":"Amount of accumulated depreciation on leased long-lived, physical assets used to produce goods and services and not intended for resale meeting the criteria for capitalization, classified as other.","units":{"USD":[{"end":"2017-05-31","val":2959000,"accn":"0001654954-18-010162","fy":2018,"fp":"FY","form":"10-K","filed":"2018-09-14","frame":"CY2017Q2I"},{"end":"2018-05-31","val":3489000,"accn":"0001654954-18-010162","fy":2018,"fp":"FY","form":"10-K","filed":"2018-09-14"},{"end":"2018-05-31","val":3489000,"accn":"0001654954-19-010917","fy":2019,"fp":"FY","form":"10-K","filed":"2019-09-19","frame":"CY2018Q2I"},{"end":"2019-05-31","val":4019000,"accn":"0001654954-19-010917","fy":2019,"fp":"FY","form":"10-K","filed":"2019-09-19","frame":"CY2019Q2I"}]}},"CapitalLeasesNetInvestmentInSalesTypeLeasesMinimumPaymentsToBeReceived":{"label":"Capital Leases, Net Investment in Sales Type Leases, Minimum Payments to be Received","description":"Amount of remaining payments as of the balance sheet date that lessees are obligated to make or can be required to make under sales-type leases, including any guarantee of residual value and executory costs. 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Cash Equivalents, and Short-term Investments","description":"Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.","units":{"USD":[{"end":"2017-05-31","val":16157000,"accn":"0001654954-18-003705","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-04-06"},{"end":"2017-05-31","val":16157000,"accn":"0001654954-18-010162","fy":2018,"fp":"FY","form":"10-K","filed":"2018-09-14","frame":"CY2017Q2I"},{"end":"2018-02-28","val":4638000,"accn":"0001654954-18-003705","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-04-06","frame":"CY2018Q1I"},{"end":"2018-05-31","val":5324000,"accn":"0001654954-18-010162","fy":2018,"fp":"FY","form":"10-K","filed":"2018-09-14","frame":"CY2018Q2I"}]}},"CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents":{"label":"Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents","description":"Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.","units":{"USD":[{"end":"2018-02-28","val":4638000,"accn":"0001654954-19-004414","fy":2018,"fp":"Q3","form":"10-Q","filed":"2019-04-15","frame":"CY2018Q1I"},{"end":"2018-05-31","val":14574000,"accn":"0001654954-19-010917","fy":2019,"fp":"FY","form":"10-K","filed":"2019-09-19","frame":"CY2018Q2I"},{"end":"2019-02-28","val":8575000,"accn":"0001654954-19-004414","fy":2018,"fp":"Q3","form":"10-Q","filed":"2019-04-15","frame":"CY2019Q1I"},{"end":"2019-05-31","val":16960000,"accn":"0001654954-19-010917","fy":2019,"fp":"FY","form":"10-K","filed":"2019-09-19","frame":"CY2019Q2I"}]}},"CashPeriodIncreaseDecrease":{"label":"Cash, Period Increase (Decrease)","description":"Amount of increase (decrease) in cash. Cash is the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Includes effect from exchange rate changes.","units":{"USD":[{"start":"2018-06-01","end":"2018-11-30","val":-4800000,"accn":"0001654954-19-000678","fy":2018,"fp":"Q2","form":"10-Q","filed":"2019-01-22"}]}},"CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations":{"label":"Cash Provided by (Used in) Investing Activities, Discontinued Operations","description":"Amount of cash inflow (outflow) of investing activities of discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.","units":{"USD":[{"start":"2017-06-01","end":"2018-05-31","val":-2309000,"accn":"0001654954-19-010917","fy":2019,"fp":"FY","form":"10-K","filed":"2019-09-19","frame":"CY2017"},{"start":"2018-06-01","end":"2019-05-31","val":42000,"accn":"0001654954-19-010917","fy":2019,"fp":"FY","form":"10-K","filed":"2019-09-19","frame":"CY2018"}]}},"CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations":{"label":"Cash Provided by (Used in) Operating Activities, Discontinued Operations","description":"Amount of cash inflow (outflow) of operating activities of discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.","units":{"USD":[{"start":"2017-06-01","end":"2018-05-31","val":1597000,"accn":"0001654954-19-010917","fy":2019,"fp":"FY","form":"10-K","filed":"2019-09-19","frame":"CY2017"},{"start":"2018-06-01","end":"2019-05-31","val":13849000,"accn":"0001654954-19-010917","fy":2019,"fp":"FY","form":"10-K","filed":"2019-09-19","frame":"CY2018"}]}},"CertificatesOfDepositAtCarryingValue":{"label":"Certificates of Deposit, at Carrying Value","description":"A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. 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