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Sales-Type Leases - Minimum Lease Payments Receivable and Net Investment (Detail) - USD ($)
$ in Thousands
Nov. 30, 2015
May. 31, 2015
Leases [Abstract]    
Gross minimum lease payments receivable $ 4,906 $ 6,109
Less – unearned interest (169) (233)
Net investment in sales-type lease receivables $ 4,737 $ 5,876