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Consolidated Statements of Cash Flows - USD ($)
12 Months Ended
Aug. 31, 2018
Aug. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income $ 7,222,847 $ 3,924,579
Adjustments to reconcile net income to net cash provided by operating activities:    
Stock-based compensation 413,010 391,664
Depreciation expense 853,555 787,111
Amortization expense 252,312 119,033
Equity in income from joint ventures (7,527,383) (5,898,908)
Dividends received from joint ventures 3,697,503 6,377,054
Gain (loss) on disposal of property and equipment (10,723) 50,000
Deferred income taxes 186,808 (117,298)
Changes in current assets and liabilities:    
Trade, excluding joint ventures (4,372,619) (1,092,187)
Trade, joint ventures (69,754) 100,151
Fees for services provided to joint ventures (54,311) 103,643
Income taxes (191,090) 90,926
Inventories (1,909,253) 305,268
Prepaid expenses and other (1,317,269) 8,454
Accounts payable 1,641,132 (129,371)
Income tax payable 73,546 (27,297)
Accrued liabilities 1,720,376 742,869
Net cash provided by operating activities 608,687 5,735,691
CASH FLOWS FROM INVESTING ACTIVITIES:    
Additions to property and equipment (680,502) (922,270)
Purchase of available for sale securities (1,518,596) (3,000,000)
Proceeds from the sale of available for sale securities 1,985,470 1,476,880
Additions to patents (86,481) (162,525)
Net cash used in investing activities (300,109) (2,607,915)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Dividend received by non-controlling interest (600,000) (200,000)
Repurchase of common stock (196,225)
Dividends paid on NTIC common stock (1,815,508)
Proceeds from employee stock purchase plan 27,951 46,536
Proceeds from exercise of stock options 15,433 122,999
Net cash used in financing activities (2,372,124) (226,690)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS (133,632) 63,841
NET INCREASE IN CASH AND CASH EQUIVALENTS (2,197,178) 2,964,927
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR 6,360,201 3,395,274
CASH AND CASH EQUIVALENTS AT END OF YEAR $ 4,163,023 $ 6,360,201