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Prepaid Expenses and Other (Details) - USD ($) $ in Thousands	May 31, 2018	May 31, 2017
Prepaid expenses and other
Software licenses	$ 1,043	$ 582
License fees	143	118
Trade shows	223	162
Rent	134	121
Other prepaid taxes	254	544
Medical device excise tax receivable	0	1,837
Other	2,505	2,762
Total	$ 4,302	$ 6,126

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Carrying amount as of the balance sheet date of prepaid licensee fees.

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Carrying amount as of the balance sheet date of payments made for software licenses.

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Carrying amount as of the balance sheet date of payments made in advance related to trade shows.

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Amount of asset related to consideration paid in advance for other costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

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