Major Suppliers (Details) - Supplier	3 Months Ended
	Feb. 29, 2020	Feb. 28, 2019
Major Suppliers (Textual)
Number of foreign supplier	1
Supplier Concentration Risk [Member] | Total Inventory Purchased [Member] | Hong Kong [Member]
Major Suppliers (Textual)
Percentage of inventory purchased of products	18.00%
Supplier Concentration Risk [Member] | Total Inventory Purchased [Member] | Elsewhere In Asia [Member]
Major Suppliers (Textual)
Percentage of inventory purchased of products	29.00%
Supplier Concentration Risk [Member] | Total Inventory Purchased [Member] | Overseas Outside of Asia [Member]
Major Suppliers (Textual)
Percentage of inventory purchased of products	1.00%
Supplier Concentration Risk [Member] | Total Inventory Purchased [Member] | Taiwan [Member]
Major Suppliers (Textual)
Percentage of inventory purchased of products	42.00%
Supplier Concentration Risk [Member] | Total Inventory Purchased [Member] | Foreign Supplier [Member]
Major Suppliers (Textual)
Percentage of inventory purchased of products	39.00%	35.00%