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Note 6 - Investments in Joint Ventures (Tables)

12 Months Ended

Aug. 31, 2019

Notes Tables

Condensed Balance Sheet [Table Text Block]

		As of August 31, 2019
		Total				EXCOR				All Other
Current assets		$	59,162,834			$	29,139,787			$	30,023,047
Total assets			63,326,703				31,666,841				31,659,862
Current liabilities			14,145,499				3,573,160				10,572,339
Noncurrent liabilities			20,797				—				20,797
Joint ventures’ equity			49,160,407				28,093,681				21,066,726
Northern Technologies International Corporation’s share of joint ventures’ equity			24,207,339				14,046,842				10,160,497
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings			22,178,126				14,015,937				8,162,189

		As of August 31, 2018
		Total				EXCOR				All Other
Current assets		$	58,086,747			$	27,354,788			$	30,731,959
Total assets			62,803,261				30,033,750				32,769,511
Current liabilities			15,991,886				4,535,954				11,455,932
Noncurrent liabilities			403,653				—				403,653
Joint ventures’ equity			46,407,722				25,497,796				20,909,926
Northern Technologies International Corporation’s share of joint ventures’ equity			22,950,995				12,748,899				10,195,263
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings		$	20,921,783			$	12,717,994			$	8,203,789

Condensed Income Statement [Table Text Block]

		Fiscal Year Ended August 31, 2019
		Total				EXCOR				All Other
Net sales		$	114,635,435			$	47,015,841			$	67,619,594
Gross profit			51,312,013				25,622,261				25,689,752
Net income			14,688,999				10,827,448				3,861,551
Northern Technologies International Corporation’s share of equity in income of joint ventures			7,225,518				5,415,362				1,810,156
Northern Technologies International Corporation’s dividends received from joint ventures			5,039,041				3,345,600				1,693,441

		Fiscal Year Ended August 31, 2018
		Total				EXCOR				All Other
Net sales		$	120,060,897			$	47,537,949			$	72,522,948
Gross profit			53,348,459				25,584,666				27,763,793
Net income			15,300,276				11,095,523				4,204,753
Northern Technologies International Corporation’s share of equity in income of joint ventures			7,527,383				5,549,765				1,977,618
Northern Technologies International Corporation’s dividends received from joint ventures		$	3,697,503			$	2,357,544			$	1,339,959