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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income $ 7,185,934 $ 6,996,737
Adjustments to reconcile net income to net cash provided by operating activities:    
Stock-based compensation 931,532 664,174
Depreciation expense 938,489 905,299
Amortization expense 629,843 203,088
Remeasurement gain on acquisition of equity method investee (3,951,550) 0
Change in allowance for doubtful accounts 57,000 262,000
Equity in income from joint ventures (4,725,918) (7,465,214)
Dividends received from joint ventures 5,723,176 3,665,365
Deferred income taxes (81,500) 114,620
Changes in current assets and liabilities:    
Trade, excluding joint ventures (2,091,353) (3,030,655)
Trade, joint ventures (73,053) (148,908)
Fees for services provided to joint ventures (259,550) (577,841)
Income taxes 284,025 (362,438)
Inventories (4,818,860) 58,314
Prepaid expenses and other 3,111 (487,771)
Accounts payable 3,010,526 866,597
Income tax payable (493,091) (160,231)
Accrued liabilities (1,122,713) 1,389,804
Net cash provided by operating activities 1,146,078 2,892,940
CASH FLOWS FROM INVESTING ACTIVITIES:    
Acquisition of Zerust India business, net of cash acquired (see Note 3) (5,062,003) 0
Investment in joint venture (341,392) 0
Purchase of available for sale securities 0 (800,000)
Proceeds from the sale of available for sale securities (956) 6,340,088
Purchases of property and equipment (1,496,674) (5,532,750)
Investments in patents (207,149) (110,654)
Net cash used in investing activities (7,108,174) (103,316)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Dividend received by non-controlling interest (402,729) (400,000)
Proceeds from line of credit 5,900,000 0
Dividends paid on NTIC common stock (2,581,179) (1,780,956)
Proceeds from employee stock purchase plan 73,645 74,333
Proceeds from exercise of stock options 198,640 584,414
Net cash provided by (used in) financing activities 3,188,377 (1,522,209)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS 426,968 10,194
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS (2,346,751) 1,277,609
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR 7,680,641 6,403,032
CASH AND CASH EQUIVALENTS AT END OF YEAR $ 5,333,890 $ 7,680,641