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Deferred Revenue	9 Months Ended
Feb. 29, 2020
Revenue from Contract with Customer [Abstract]
Deferred Revenue	Note 8. Deferred Revenue Advances from a customer pursuant to a contract for the sale of plastic pallets is recognized as deferred revenue. Revenue is recognized by Greystone as pallets are shipped to the customer(s). Customer advances totaled $5,981,710 and $3,280,500 during the nine months ended February 29(28), 2020 and 2019, respectively. Revenue recognition from customer advances during the nine months ended February 29, 2020 was $2,242,184. The unrecognized balance of deferred revenue at February 29, 2020 and May 31, 2019, was $5,940,593 and $2,201,067, respectively.

Deferred Revenue

9 Months Ended

Feb. 29, 2020

Revenue from Contract with Customer [Abstract]

Note 8. Deferred Revenue

Advances from a customer pursuant to a contract for the sale of plastic pallets is recognized as deferred revenue. Revenue is recognized by Greystone as pallets are shipped to the customer(s). Customer advances totaled $5,981,710 and $3,280,500 during the nine months ended February 29(28), 2020 and 2019, respectively. Revenue recognition from customer advances during the nine months ended February 29, 2020 was $2,242,184. The unrecognized balance of deferred revenue at February 29, 2020 and May 31, 2019, was $5,940,593 and $2,201,067, respectively.