Note 11 - Segment and Geographic Information - Cost of Goods Sold by Segment (Details) - USD ($)	3 Months Ended	9 Months Ended
May 31, 2024	May 31, 2023	May 31, 2024	May 31, 2023
Cost of goods sold	$ 12,793,103	$ 13,389,873	$ 38,143,878	$ 38,957,272
Direct Cost of Goods Sold [Member] \| ZERUST [Member]
Cost of goods sold	$ 8,168,215	$ 9,116,091	$ 24,994,401	$ 26,410,796
Cost of goods sold, percentage	55.10%	56.60%	55.00%	57.50%
Direct Cost of Goods Sold [Member] \| NaturTec [Member]
Cost of goods sold	$ 3,768,921	$ 3,576,676	$ 10,566,223	$ 10,078,385
Cost of goods sold, percentage	64.40%	73.50%	65.00%	76.00%
Indirect Cost of Goods Sold [Member]
Cost of goods sold	$ 855,967	$ 697,106	$ 2,583,254	$ 2,468,091

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(2)(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(2)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 924
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479941/924-10-S99-1

Name:	us-gaap_CostOfGoodsAndServicesSold
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration