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Sales-Type Leases (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2012	May 31, 2012
Minimum lease payments receivable and the net investment:
Gross minimum lease payments receivable	$ 11,343	$ 12,284
Less - unearned interest	(542)	(603)
Net investment in sales-type lease receivables	$ 10,801	$ 11,681

The remaining (unamortized) difference between the gross investment in a sales-type lease and the cost or carrying amount of the leased property as of the balance sheet date.

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- Definition

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. The amount also includes any guaranteed rental payments by an unrelated third-party provided that are financially capable of making such payments.

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