Note 1 - Nature of Business and Significant Accounting Policies (Details Textual)			12 Months Ended
	Jun. 28, 2019	Jun. 03, 2019	Aug. 31, 2019 USD ($)	Aug. 31, 2018 USD ($)
Number of Countries in which Entity Operates			60
Number of Operating Segments			2
Accounts Receivable, Allowance for Credit Loss, Ending Balance			$ 65,000	$ 50,000
Stockholders' Equity Note, Stock Split, Conversion Ratio	2	2
Natur-Tech India [Member]
Noncontrolling Interest, Ownership Percentage by Parent			75.00%
Natur Tec Lanka [Member]
Noncontrolling Interest, Ownership Percentage by Parent			75.00%
Zerust Brazil [Member]
Noncontrolling Interest, Ownership Percentage by Parent			85.00%
NTI Asean LLC [Member]
Noncontrolling Interest, Ownership Percentage by Parent			60.00%
Maximum [Member] | Various Joint Ventures [Member]
Noncontrolling Interest, Ownership Percentage by Parent			50.00%