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Note 4 - Property and Equipment, Net (Tables)
3 Months Ended
Nov. 30, 2018
Notes Tables  
Property, Plant and Equipment [Table Text Block]
    November 30, 2018   August 31, 2018
Land   $
310,365
    $
310,365
 
Buildings and improvements    
6,988,619
     
6,927,484
 
Machinery and equipment    
4,724,490
     
4,680,072
 
     
12,023,474
     
11,917,921
 
Less accumulated depreciation    
(4,964,238
)    
(4,749,095
)
    $
7,059,236
    $
7,168,826