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Consolidated Statements of Cash Flows - USD ($)
12 Months Ended
Aug. 31, 2021
Aug. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) $ 6,996,737 $ (934,760)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Stock-based compensation 664,174 1,337,774
Depreciation expense 905,299 836,601
Amortization expense 203,088 231,624
Change in allowance for doubtful accounts 262,000 25,000
Equity in income from joint ventures (7,465,214) (4,270,327)
Dividends received from joint ventures 3,665,365 5,672,099
Loss on disposal of property and patents 0 173,810
Deferred income taxes 114,620 1,424,529
Changes in current assets and liabilities:    
Trade, excluding joint ventures (3,030,655) 1,680,611
Trade, joint ventures (148,908) 348,573
Fees for services provided to joint ventures (577,841) 340,714
Income taxes (362,438) 424,002
Inventories 58,314 (435,712)
Prepaid expenses and other (487,771) 279,312
Accounts payable 866,597 (1,229,510)
Income tax payable (160,231) 302,641
Accrued liabilities 1,389,804 (1,294,911)
Net cash provided by operating activities 2,892,940 4,912,070
CASH FLOWS FROM INVESTING ACTIVITIES:    
Proceeds from the sale of property and equipment 0 2,190
Purchase of available for sale securities (800,000) (4,000,000)
Proceeds from the sale of available for sale securities 6,340,088 2,020,536
Purchases of property and equipment (5,532,750) (711,412)
Investments in patents (110,654) (95,996)
Net cash used in investing activities (103,316) (2,784,682)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Dividend received by non-controlling interest (400,000) (400,000)
Dividends paid on NTIC common stock (1,780,956) (1,182,200)
Proceeds from employee stock purchase plan 74,333 64,195
Proceeds from exercise of stock options 584,414 0
Net cash used in financing activities (1,522,209) (1,518,005)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS 10,194 (63,109)
NET INCREASE IN CASH AND CASH EQUIVALENTS 1,277,609 546,274
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR 6,403,032 5,856,758
CASH AND CASH EQUIVALENTS AT END OF YEAR $ 7,680,641 $ 6,403,032