Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018
NET SALES:
Net sales, excluding joint ventures	$ 13,780,804	$ 12,044,513	$ 39,998,118	$ 34,479,773
Net sales, to joint ventures	1,112,313	879,324	2,304,455	2,201,077
Total net sales	14,893,117	12,923,837	42,302,573	36,680,850
Cost of goods sold	10,138,353	8,592,366	28,883,589	24,493,672
Gross profit	4,754,764	4,331,471	13,418,984	12,187,178
JOINT VENTURE OPERATIONS:
Equity in income from joint ventures	1,877,410	2,246,066	5,596,788	5,793,391
Fees for services provided to joint ventures	1,433,823	1,508,500	4,299,032	4,624,532
Total joint venture operations	3,311,233	3,754,566	9,895,820	10,417,923
OPERATING EXPENSES:
Selling expenses	2,761,488	2,784,694	8,077,663	8,028,279
General and administrative expenses	2,527,192	1,987,785	6,986,526	6,012,746
Research and development expenses	1,005,045	860,347	2,804,739	2,581,824
Total operating expenses	6,293,725	5,632,826	17,868,928	16,622,849
OPERATING INCOME	1,772,272	2,453,211	5,445,876	5,982,252
INTEREST INCOME	24,114	35,630	52,023	84,569
INTEREST EXPENSE	(5,165)	(3,139)	(11,357)	(14,007)
INCOME BEFORE INCOME TAX EXPENSE	1,791,221	2,485,702	5,486,542	6,052,814
INCOME TAX EXPENSE	150,257	181,683	652,331	1,128,583
NET INCOME	1,640,964	2,304,019	4,834,211	4,924,231
NET INCOME ATTRIBUTABLE TO NON-CONTROLLING INTERESTS	158,815	161,267	453,435	365,006
NET INCOME ATTRIBUTABLE TO NTIC	$ 1,482,149	$ 2,142,752	$ 4,380,776	$ 4,559,225
NET INCOME ATTRIBUTABLE TO NTIC PER COMMON SHARE:
Basic (in dollars per share)	$ 0.16	$ 0.24	$ 0.48	$ 0.50
Diluted (in dollars per share)	$ 0.16	$ 0.23	$ 0.46	$ 0.49
WEIGHTED AVERAGE COMMON SHARES ASSUMED OUTSTANDING:
Basic (in shares)	9,084,354	9,078,706	9,085,584	9,077,676
Diluted (in shares)	9,392,444	9,414,064	9,440,858	9,327,694
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.06	$ 0.05	$ 0.18	$ 0.15