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Property, Plant and Equipment (Tables)
6 Months Ended
Nov. 30, 2019
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment

A summary of property, plant and equipment for Greystone is as follows:

 

    November 30, 2019     May 31, 2019  
Production machinery and equipment   $ 47,323,256     $ 45,645,910  
Plant buildings and land     6,724,513       6,336,855  
Leasehold improvements     1,129,474       979,890  
Furniture and fixtures     601,586       563,074  
Right-to-use assets under operating leases     218,634       180,794  
      55,997,463       53,706,523  
                 
Less: Accumulated depreciation and amortization     (23,583,987 )     (21,026,051 )
                 
Net Property, Plant and Equipment   $ 32,413,476     $ 32,680,472