Consolidated Statements of Operations - USD ($)	12 Months Ended
	Aug. 31, 2025	Aug. 31, 2024
NET SALES:
Net sales	$ 84,234,474	$ 85,059,517
Cost of goods sold	52,557,919	51,273,155
Gross profit	31,676,555	33,786,362
JOINT VENTURE OPERATIONS:
Equity in income from joint ventures	3,539,056	4,223,296
Fees for services provided to joint ventures	5,006,151	5,251,782
Total joint venture operations	8,545,207	9,475,078
OPERATING EXPENSES:
Selling expenses	17,820,196	16,413,672
General and administrative expenses	14,792,988	14,176,494
Research and development expenses	5,038,281	4,802,791
Total operating expenses	37,651,465	35,392,957
OPERATING INCOME	2,570,297	7,868,483
INTEREST INCOME	308,054	118,827
INTEREST EXPENSE	(599,927)	(340,129)
OTHER INCOME	1,139,756	0
OTHER EXPENSE	(386,785)	0
INCOME BEFORE INCOME TAX EXPENSE	3,031,395	7,647,181
INCOME TAX EXPENSE	2,045,002	1,325,797
NET INCOME	986,393	6,321,384
NET INCOME ATTRIBUTABLE TO NON-CONTROLLING INTERESTS	968,774	912,302
NET INCOME ATTRIBUTABLE TO NTIC	$ 17,619	$ 5,409,082
NET INCOME ATTRIBUTABLE TO NTIC PER COMMON SHARE:
Basic (in dollars per share)	$ 0	$ 0.57
Diluted (in dollars per share)	$ 0	$ 0.55
WEIGHTED AVERAGE COMMON SHARES ASSUMED OUTSTANDING:
Basic (in shares)	9,476,085	9,434,020
Diluted (in shares)	9,639,676	9,833,450
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.16	$ 0.28