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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
6 Months Ended
Feb. 29, 2020
Feb. 28, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income $ 1,643,361 $ 3,193,247
Adjustments to reconcile net income to net cash provided by operating activities:    
Stock-based compensation 658,470 715,960
Depreciation expense 428,711 429,377
Amortization expense 118,171 129,346
Equity in income from joint ventures (2,654,794) (3,719,378)
Deferred income taxes 111,768 135,167
Dividends received from joint ventures 5,558,926 2,027,243
Gain on sale of property and equipment (36,285)
Changes in current assets and liabilities:    
Trade, excluding joint ventures (10,778) 730,647
Trade, joint ventures 285,298 82,157
Fees for services provided to joint ventures 72,781 18,762
Income taxes 221,211 (222,609)
Inventories (908,423) (2,048,648)
Prepaid expenses and other 122,676 215,178
Accounts payable 850,534 113,849
Income tax payable (10,833) 15,607
Accrued liabilities (2,284,150) (1,517,466)
Net cash provided by operating activities 4,207,710 262,153
CASH FLOWS FROM INVESTING ACTIVITIES:    
Proceeds from the sale of available for sale securities 4,000,000 2,072,842
Purchase of available for sale securities (6,946,908)  
Purchases of property and equipment (296,786) (439,899)
Investments in patents (45,414) (57,401)
Net cash (used in) provided by investing activities (3,289,108) 1,575,542
CASH FLOWS FROM FINANCING ACTIVITIES:    
Dividend received by non-controlling interest (200,000)
Investment by non-controlling interest 134,035
Dividends paid on NTIC common stock (1,182,199) (1,090,125)
Proceeds from employee stock purchase plan 35,608 17,681
Principal payments on finance lease obligations
Net cash used in financing activities (1,146,591) (1,138,409)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS (2,359) 74,068
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS (230,348) 773,354
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 5,856,758 4,163,023
CASH AND CASH EQUIVALENTS AT END OF PERIOD $ 5,626,410 $ 4,936,377