REVENUE (Details 2) - USD ($) $ in Thousands	3 Months Ended
Aug. 31, 2021	Aug. 31, 2020
Net sales	$ 5,646	$ 2,012
Products and Services Transferred at a Point in Time
Net sales	5,290	1,570
Services Transferred over Time
Net sales	$ 356	$ 442

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details