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Note 1 - Nature of Business and Significant Accounting Policies (Details Textual)	12 Months Ended
	Aug. 31, 2018 USD ($)	Aug. 31, 2017 USD ($)
Number of Countries in which Entity Operates	60
Number of Operating Segments	2
Number of Joint Venture Arrangements	20
Allowance for Doubtful Accounts Receivable, Ending Balance	$ 50,000	$ 40,000
NaturTec [Member]
Noncontrolling Interest, Ownership Percentage by Parent	90.00%
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]
Noncontrolling Interest, Ownership Percentage by Parent	50.00%

X

- Definition

Number of active joint venture arrangements the company participates, either directly or indirectly.

+ References

No definition available.

+ Details

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X

- Definition

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

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X

- Definition

The number of countries in which the entity operates as of balance sheet date.

+ References

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X

- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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X

- Details

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X

- Details

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X

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