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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
3 Months Ended
Nov. 30, 2020
Nov. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income $ 1,405,157 $ 1,359,539
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Stock-based compensation 181,669 318,818
Depreciation expense 211,932 211,132
Amortization expense 49,989 58,521
Change in allowance for doubtful accounts 30,000 0
Equity in income from joint ventures (1,825,712) (1,293,990)
Dividends received from joint ventures 1,125,361 205,432
Deferred income taxes 338 114,166
Changes in current assets and liabilities:    
Trade, excluding joint ventures (1,334,199) (534,080)
Trade, joint ventures (199,491) 182,798
Fees for services provided to joint ventures (221,879) (97,864)
Income taxes 10,001 262,440
Inventories 1,242,101 (734,384)
Prepaid expenses and other (108,751) (97,035)
Accounts payable 1,046,577 518,930
Income tax payable 156,951 7,970
Accrued liabilities (168,924) (2,049,549)
Net cash provided by (used in) operating activities 1,601,120 (1,567,157)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchase of available for sale securities (838,063) (2,521,837)
Proceeds from the sale of available for sale securities 0 3,100,000
Purchases of property and equipment (309,400) (197,370)
Investments in patents (30,406) (27,493)
Net cash (used in) provided by investing activities (1,177,869) 353,300
CASH FLOWS FROM FINANCING ACTIVITIES:    
Dividends paid on NTIC common stock 0 (590,878)
Proceeds from employee stock purchase plan 36,192 35,607
Net cash provided by (used in) financing activities 36,192 (555,271)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS: 90,866 19,166
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 550,309 (1,749,962)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 6,403,032 5,856,758
CASH AND CASH EQUIVALENTS AT END OF PERIOD $ 6,953,341 $ 4,106,796