Note 11 - Segment and Geographic Information - Cost of Goods Sold by Segment (Details) - USD ($)	3 Months Ended	6 Months Ended
Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022
ZERUST®	$ 11,867,639	$ 11,764,304	$ 25,467,281	$ 24,254,787
Indirect Cost of Goods Sold [Member]
ZERUST®	821,152	837,594	1,670,867	1,699,313
ZERUST [Member] \| Direct Cost of Goods Sold [Member]
ZERUST®	$ 8,115,451	$ 8,151,274	$ 17,294,705	$ 16,857,941
ZERUST®	56.10%	62.10%	58.00%	61.20%
NaturTec [Member] \| Direct Cost of Goods Sold [Member]
ZERUST®	$ 2,931,036	$ 2,775,436	$ 6,501,709	$ 5,697,533
ZERUST®	76.90%	76.40%	77.40%	77.00%

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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

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