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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
6 Months Ended
Feb. 28, 2018
Feb. 28, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income $ 2,620,212 $ 891,667
Adjustments to reconcile net income to net cash used in operating activities:    
Stock-based compensation 206,534 195,832
Depreciation expense 418,562 385,583
Amortization expense 125,092 59,517
Equity in income from joint ventures (3,547,325) (2,657,143)
Deferred income taxes 700,000 24,987
Dividends received from joint ventures 1,770,116 564,934
Changes in current assets and liabilities:    
Trade, excluding joint ventures (2,292,004) (1,177,496)
Trade, joint ventures 244,372 329,321
Fees for services provided to joint ventures (62,381) 164,018
Income taxes (178,998) (16,484)
Inventories (1,631,734) (349,600)
Prepaid expenses and other (504,848) (103,671)
Accounts payable 1,669,859 915,538
Income tax payable 139,991 (91,282)
Accrued liabilities (193,647) 40,854
Net cash used in operating activities (516,199) (823,425)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Proceeds from the sale of available for sale securities 498,558 1,495,610
Additions to property and equipment (207,350) (599,063)
Additions to patents (44,621) (85,959)
Net cash provided by investing activities 246,587 810,588
CASH FLOWS FROM FINANCING ACTIVITIES:    
Dividend received by non-controlling interest (200,000) (200,000)
Repurchase of common stock (148,162)
Dividends paid on NTIC common stock (907,252)
Proceeds from option exercises 15,375
Proceeds from employee stock purchase plan 12,481 32,955
Net cash used in financing activities (1,079,396) (315,207)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS: 55,894 (18,282)
NET DECREASE IN CASH AND CASH EQUIVALENTS (1,293,114) (346,326)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 6,360,201 3,395,274
CASH AND CASH EQUIVALENTS AT END OF PERIOD $ 5,067,087 $ 3,048,948