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Revenue Recognition - Schedule of Contract Liabilities and Revenue Recognized (Details)
$ in Thousands
6 Months Ended
Nov. 30, 2019
USD ($)
Revenue From Contract With Customer [Abstract]  
Contract Liabilities (Deferred Revenue), Beginning Balance $ 2,260
Contract Liabilities (Deferred Revenue), Additions 1,169
Contract Liabilities (Deferred Revenue), Revenue Recognized (1,805)
Contract Liabilities (Deferred Revenue), Ending Balance $ 1,624