Basis of Presentation (Policies)	3 Months Ended
Basis of Presentation (Policies)	Aug. 31, 2015
Accounting Policies [Abstract]
Revenue Recognition	Revenue Recognition We generate revenues primarily through the rental and leasing of test and measurement equipment (“T&M”) and personal computer-related data products equipment (“DP”) and through the sale of new and used equipment. Rental revenues comprise short term agreements that can be daily, weekly or monthly. Rental revenues are recognized in the month they are due on the accrual basis of accounting. We lease equipment under both operating and finance lease agreements. Our operating lease agreements have varying terms, typically one to three years. Upon lease termination, customers have the option to renew the lease term, purchase the equipment at fair market value, or continue to rent on a month-to-month basis. Our operating leases do not provide for contingent rentals. Revenues related to operating leases are recognized on a straight-line basis over the term of the lease. Negotiated lease early-termination charges are recognized upon receipt. Rentals and leases are primarily billed to customers in advance, and unearned billings are recorded as deferred revenue. We enter into finance leases as lessor for some of our equipment. Our finance lease agreements contain bargain purchase options and are accounted for as sale-type leases. Revenues from finance leases, which are recorded at the present value of the aggregate future lease payments, net of unearned interest, are included in sales of equipment and other revenues in our consolidated statements of operations. Unearned interest is recognized over the life of the finance lease term using the effective interest method. Our finance lease terms vary, and are typically one to three years. The net investment in finance leases, which represents the receivables due from lessees, net of unearned interest, is included in other assets in our consolidated balance sheets. Historically, we have not required security deposits based on our assessed credit risk within our customer bases. Initial direct costs for operating and finance leases are insignificant. Sales of new equipment are recognized in the period in which the equipment is delivered and risk of loss passes to the customer, while sales of used equipment from our rental and lease equipment pool are recognized in the period in which the equipment is shipped and risk of loss passes to the customer. In the case of equipment sold to customers that is already on rent or lease to the same party, revenue is recognized at the agreed-upon date when the rent or lease term ends and the risk of loss passes to the customer. The amount of revenue recognized for sales of new equipment depends on whether we sell as principal or as agent for the original equipment manufacturer. Prior to May 31, 2015, our sales of new equipment were derived primarily from the reseller agreement with Keysight Technologies, Inc. Under the terms of that agreement we acted as the principal with respect to sales of new equipment, based on several factors, including: (1) We acted as the primary obligor by working directly with our customers to define their needs, providing them with options to satisfy such needs, contracting directly with the customer, and, to the extent required, providing customers with instruction on the use of the product and additional technical support once the product is received by the customer. The product manufacturer was not a party to our customer sales agreements, nor was it referenced in the agreements, and therefore had no obligation to our customers with the exception of the manufacturer’s standard warranty on the product; (2) We bore back-end risk of inventory loss with respect to any product return from the customer as the original manufacturer was not required to accept returns of equipment from us. We also bore front-end risk of inventory loss in those cases where we acquired products for resale into our equipment pool prior to shipment to customers; (3) We had full discretion in setting pricing terms with our customers and negotiated all such terms ourselves; and (4) We assumed all credit risk. In situations where we act as principal, the gross sales of new equipment are recorded in sales of equipment and other revenues, while the related equipment costs, including the purchase price from the original equipment manufacturer, are recorded in costs of sales of equipment and other revenues in our consolidated statements of operations. We are currently establishing new resale relationships, where we may act as an agent for the original equipment manufacturer. Under those arrangements, we recognize revenue only on the commissions that we receive, which are recorded in other revenue within the sales of equipment and other revenues in our consolidated statement of operations. Other revenues, which primarily include billings to customers for delivery and repairs, are recognized in the period in which the respective services are performed.
Operating expenses	Operating Expenses Costs of rentals and leases, excluding depreciation, primarily include labor related costs of our operations personnel, supplies, repairs, insurance and warehousing costs associated with our rental and lease equipment, relating to our rental and lease revenues. Costs of rentals and leases included impairment charges of $443 and $0 related to our T&M rental and lease equipment during the three months ended August 31, 2015 and 2014, respectively. Costs of sales of equipment and other revenues primarily include the cost of new equipment and the carrying value of used equipment sold. Selling, general and administrative (“SG&A”) expenses include sales and advertising costs, payroll and related benefit costs, insurance expenses, property taxes on our property and rental and lease equipment, legal and professional fees, and administrative overhead. Advertising costs are expensed as incurred.
Foreign Currency	Foreign Currency The U.S. dollar has been determined to be the functional currency of all foreign subsidiaries. The euro, Canadian dollar and Chinese yuan are our primary foreign currencies. The assets and liabilities of our foreign subsidiaries are remeasured from their local currency to U.S. dollars at current or historic exchange rates, as appropriate. Revenues and expenses are remeasured from any foreign currencies to U.S. dollars using historic or average monthly exchange rates, as appropriate, for the month in which the transaction occurred. Remeasurement gains and losses are included in SG&A expenses or income taxes, as appropriate. The assets, liabilities, revenues and expenses of our foreign operations that are susceptible to foreign currency fluctuations are individually less than 10% of our respective consolidated amounts. Net remeasurement gains and losses have not been significant. We enter into forward contracts to hedge against unfavorable currency fluctuations in our monetary assets and liabilities in our European, Chinese and Canadian operations. These contracts are designed to minimize the effect of fluctuations in foreign currencies. To qualify for hedge accounting, contracts must reduce the foreign currency exchange rate and interest rate risk otherwise inherent in the amount and duration of the hedged exposures and comply with established risk management policies. Our derivative instruments are not designated as hedging instruments and, therefore, are recorded at fair value as an asset or liability, and any changes in fair value are recorded in our consolidated statements of operations. We do not use derivative financial instruments for speculative trading purposes.
Other Assets	Demonstration equipment is recorded at the lower of cost or estimated market value until the units are sold or transferred to our rental and lease equipment pool. Demonstration equipment transferred to our rental and lease equipment pool is depreciated over its remaining estimated useful life. We also have a Supplemental Executive Retirement Plan (“SERP”) that provides for automatic deferral of contributions in excess of the maximum amount permitted under the 401(k) for our executives who choose to participate. The SERP is a non-qualified deferred compensation program. We have the option to match contributions of participants at a rate we determine each year.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board and the International Accounting Standards Board issued guidance to establish a new, more robust framework for the recognition of revenue related to the transfer of goods and services to customers. This guidance is effective for reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. The impact this guidance will have on the consolidated financial statements cannot be determined at this time.
Other Comprehensive Income	Other Comprehensive Income Comprehensive income is equivalent to net income for all periods presented.

Disclosure of accounting policy for revenue recognition. If the entity has different policies for different types of revenue transactions, the policy for each material type of transaction is generally disclosed. If a sales transaction has multiple element arrangements (for example, delivery of multiple products, services or the rights to use assets) the disclosure may indicate the accounting policy for each unit of accounting as well as how units of accounting are determined and valued. The disclosure may encompass important judgment as to appropriateness of principles related to recognition of revenue. The disclosure also may indicate the entity's treatment of any unearned or deferred revenue that arises from the transaction.