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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
9 Months Ended
May 31, 2019
May 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income $ 4,834,211 $ 4,924,231
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Stock-based compensation 1,073,940 309,743
Depreciation expense 627,853 631,399
Amortization expense 195,230 188,460
Gain on disposal of assets (36,210) (11,662)
Equity in income from joint ventures (5,596,788) (5,793,391)
Dividends received from joint ventures 3,822,785 2,941,807
Deferred income taxes 177,916 700,000
Changes in current assets and liabilities:    
Trade, excluding joint ventures (132,122) (2,827,606)
Trade, joint ventures (174,179) 93,947
Fees for services provided to joint ventures 114,327 (49,305)
Income taxes (343,377) (267,131)
Inventories (1,465,663) (1,773,085)
Prepaid expenses and other 709,049 (718,839)
Accounts payable 495,251 728,657
Income tax payable (93,169) 104,643
Accrued liabilities (1,491,663) 676,138
Net cash provided by (used in) operating activities 2,717,391 (141,994)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchase of available for sale securities (2,340,503) (1,018,596)
Proceeds from the sale of available for sale securities 3,100,000 1,502,665
Purchases of property and equipment (716,212) (500,924)
Investments in patents (87,222) (62,594)
Net cash used in investing activities (43,937) (79,449)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Dividend received by non-controlling interest (200,000) (200,000)
Investment by non-controlling interest 134,034
Dividends paid on NTIC common stock (1,635,183) (1,361,382)
Proceeds from employee stock purchase plan 52,547 27,951
Proceeds from option exercises 15,433
Net cash used in financing activities (1,648,602) (1,517,998)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS 36,605 (10,435)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 1,061,457 (1,749,876)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 4,163,023 6,360,201
CASH AND CASH EQUIVALENTS AT END OF PERIOD $ 5,224,480 $ 4,610,325