Revenue and Revenue Recognition - Schedule of Sale of Revenues for Customer Categories (Details)	9 Months Ended
Feb. 28, 2019	Feb. 28, 2018
Total	99.00%	98.00%
Major Customers (End Users) [Member]
Total	85.00%	76.00%
Distributors [Member]
Total	14.00%	22.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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