Note 6 - Investments in Joint Ventures (Tables)

12 Months Ended

Aug. 31, 2016

Notes Tables

Condensed Balance Sheet [Table Text Block]

	As of August 31, 2016
	Total		EXCOR		All Other
Current assets	$	48,922,924	$	22,928,810	$	25,994,114
Total assets		52,407,026		24,733,340		27,673,686
Current liabilities		12,433,700		3,485,231		8,948,469
Noncurrent liabilities		100,783		—		100,783
Joint ventures’ equity		39,872,543		21,248,109		18,624,434
Northern Technologies International Corporation’s share of joint ventures’ equity		19,840,774		10,624,056		9,216,728
Northern Technologies International Corporation's share of joint ventures’ undistributed earnings		17,779,912	$	10,593,151	$	7,186,761
Northern Technologies International Corporation's dividends received from joint ventures	$	5,503,314	$	4,364,700	$	1,165,614

	As of August 31, 2015
	Total		EXCOR		All Other
Current assets	$	49,295,116	$	22,620,323	$	26,674,793
Total assets		52,853,938		24,606,880		28,247,058
Current liabilities		12,288,383		3,360,142		8,928,241
Noncurrent liabilities		1,215,139		—		1,215,139
Joint ventures’ equity		39,350,417		21,246,738		18,103,679
Northern Technologies International Corporation’s share of joint ventures’ equity		20,544,238		11,571,361		8,972,877
Northern Technologies International Corporation's share of joint ventures’ undistributed earnings		18,483,377		11,540,456		6,942,921
Northern Technologies International Corporation's dividends received from joint ventures	$	2,983,338	$	2,440,200	$	543,138

Condensed Income Statement [Table Text Block]

	Fiscal Year Ended August 31, 2016
	Total		EXCOR		All Other
Net sales	$	90,646,833	$	35,138,214	$	55,508,619
Gross profit		40,440,726		18,635,421		21,805,305
Net income		9,534,771		7,049,462		2,485,309
Northern Technologies International Corporation’s share of equity in income from joint ventures	$	4,743,831	$	3,534,113	$	1,209,718

	Fiscal Year Ended August 31, 2015
	Total		EXCOR		All Other
Net sales	$	99,026,251	$	36,872,664	$	62,153,587
Gross profit		48,397,318		19,993,763		28,403,555
Net income		11,849,107		8,201,659		3,647,448
Northern Technologies International Corporation’s share of equity in income from joint ventures	$	5,936,565	$	4,091,608	$	1,844,957