Inventories - Additional Information (Detail) - USD ($)  | 
Feb. 29, 2020  | 
May 31, 2019  | 
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| Inventory Disclosure [Abstract] | ||
| Inventory, Raw Materials, Net of Reserves | $ 15,895,589 | $ 0 | 
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- References No definition available. 
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- Definition Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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