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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