XML 60 R47.htm IDEA: XBRL DOCUMENT v3.7.0.1
Note 12 - Segment and Geographic Information - Cost of Goods Sold by Segment (Details) - USD ($)
 3 Months Ended 9 Months Ended
May 31, 2017
May 31, 2016
May 31, 2017
May 31, 2016
Precentage of product sales [1]
Cost of goods sold $ 6,774,001 $ 5,777,249 $ 19,256,953 $ 15,920,896
Direct Cost of Goods Sold [Member] | ZERUST [Member]        
Precentage of product sales [1] 57.80% 56.10% 58.20% 56.10%
Cost of goods sold $ 4,834,355 $ 4,028,114 $ 13,788,416 $ 10,968,742
Direct Cost of Goods Sold [Member] | NaturTec [Member]        
Precentage of product sales [1] 71.60% 74.60% 72.40% 76.00%
Cost of goods sold $ 1,327,323 $ 1,119,730 $ 3,608,722 $ 2,938,927
Indirect Cost of Goods Sold [Member]        
Precentage of product sales [1]
Cost of goods sold $ 612,323 $ 629,405 $ 1,859,815 $ 2,013,227
[1] The percent of segment sales is calculated by dividing the direct cost of goods sold for each individual segment category by the net sales for each segment category.