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Prepaid Expenses and Other (Details) (USD $) In Thousands, unless otherwise specified	May 31, 2014	May 31, 2013	May 31, 2012
Prepaid expenses and other
Deposits	$ 3,356us-gaap_DepositsAssets	$ 4,029us-gaap_DepositsAssets
Other prepaid taxes	202ango_PrepaidIncomeandOtherTaxes	458ango_PrepaidIncomeandOtherTaxes
Licensee fees	604ango_PrepaidLicenseeFees	597ango_PrepaidLicenseeFees
Software licenses	130ango_SoftwareLicenses	520ango_SoftwareLicenses
Trade shows	62ango_TradeShows	487ango_TradeShows
Rent	114us-gaap_PrepaidRent	135us-gaap_PrepaidRent
Insurance	395us-gaap_PrepaidInsurance	120us-gaap_PrepaidInsurance
Interest receivable	1us-gaap_InterestReceivable	2us-gaap_InterestReceivable
Other	607us-gaap_OtherPrepaidExpenseCurrent	937us-gaap_OtherPrepaidExpenseCurrent
Total	5,471us-gaap_PrepaidExpenseAndOtherAssetsCurrent	7,285us-gaap_PrepaidExpenseAndOtherAssetsCurrent	9,803us-gaap_PrepaidExpenseAndOtherAssetsCurrent
Prepaid income taxes	$ 510us-gaap_PrepaidTaxes	$ 563us-gaap_PrepaidTaxes

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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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