Related Party Transactions/Activity	9 Months Ended
Feb. 28, 2018
Related Party Transactions [Abstract]
Related Party Transactions/ Activity	Note 5. Related Party Transactions/Activity Yorktown Management & Financial Services, LLC Yorktown Management & Financial Services, LLC (“Yorktown”), an entity wholly-owned by Greystone’s CEO and President, owns and rents to Greystone (1) grinding equipment used to grind raw materials for Greystone’s pallet production and (2) extruders for pelletizing recycled plastic into pellets for resale and for use as raw material in the manufacture of pallets. GSM pays weekly rental fees to Yorktown of $22,500 for use of Yorktown’s grinding equipment and $5,000 for the use of Yorktown’s pelletizing equipment for which GSM paid Yorktown rental fees of $1,072,500 and $1,100,000 for the nine months ended February 28, 2018 and 2017, respectively. In addition, Yorktown provides office space for Greystone in Tulsa, Oklahoma at a monthly rental of $4,000. TriEnda Holdings, L.L.C. TriEnda Holdings, L.L.C. (“TriEnda”) is a manufacturer of plastic pallets, protective packing and dunnage utilizing thermoform processing for which Warren F. Kruger, Greystone’s President and CEO, serves TriEnda as the non-executive Chairman of the Board and is a partner in a partnership which has a majority ownership interest in TriEnda. Greystone provided tolling services, blending and pelletizing plastic resin, for TriEnda through March 2017. Revenue from TriEnda totaled $-0- and $519,814 for the nine months ended February 28, 2018 and 2017, respectively. Greystone periodically purchases material and pallets from TriEnda. Purchases for the nine months ended February 28, 2018 and 2017 totaled $123,072 and $24,265, respectively. Green Plastic Pallets Greystone sells plastic pallets to Green Plastic Pallets (“Green”), an entity that is owned by James Kruger, brother to Warren Kruger, Greystone’s President and CEO. Greystone had sales to Green of $330,144 and $220,325 for the nine months ended February 28, 2018 and 2017, respectively. The account receivable due from Green at February 28, 2018 was $55,080.

Related Party Transactions/Activity

9 Months Ended

Feb. 28, 2018

Note 5. Related Party Transactions/Activity

Yorktown Management & Financial Services, LLC

Yorktown Management & Financial Services, LLC (“Yorktown”), an entity wholly-owned by Greystone’s CEO and President, owns and rents to Greystone (1) grinding equipment used to grind raw materials for Greystone’s pallet production and (2) extruders for pelletizing recycled plastic into pellets for resale and for use as raw material in the manufacture of pallets. GSM pays weekly rental fees to Yorktown of $22,500 for use of Yorktown’s grinding equipment and $5,000 for the use of Yorktown’s pelletizing equipment for which GSM paid Yorktown rental fees of $1,072,500 and $1,100,000 for the nine months ended February 28, 2018 and 2017, respectively.

In addition, Yorktown provides office space for Greystone in Tulsa, Oklahoma at a monthly rental of $4,000.

TriEnda Holdings, L.L.C.

TriEnda Holdings, L.L.C. (“TriEnda”) is a manufacturer of plastic pallets, protective packing and dunnage utilizing thermoform processing for which Warren F. Kruger, Greystone’s President and CEO, serves TriEnda as the non-executive Chairman of the Board and is a partner in a partnership which has a majority ownership interest in TriEnda. Greystone provided tolling services, blending and pelletizing plastic resin, for TriEnda through March 2017. Revenue from TriEnda totaled $-0- and $519,814 for the nine months ended February 28, 2018 and 2017, respectively.

Greystone periodically purchases material and pallets from TriEnda. Purchases for the nine months ended February 28, 2018 and 2017 totaled $123,072 and $24,265, respectively.

Green Plastic Pallets

Greystone sells plastic pallets to Green Plastic Pallets (“Green”), an entity that is owned by James Kruger, brother to Warren Kruger, Greystone’s President and CEO. Greystone had sales to Green of $330,144 and $220,325 for the nine months ended February 28, 2018 and 2017, respectively. The account receivable due from Green at February 28, 2018 was $55,080.