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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
3 Months Ended
Nov. 30, 2022
Nov. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:    
NET INCOME $ 633,680 $ 4,721,833
Adjustments to reconcile net income to net cash provided by operating activities:    
Stock-based compensation 329,522 232,883
Depreciation expense 262,876 215,306
Amortization expense 147,811 119,894
Remeasurement gain on acquisition of equity method investee 0 (3,951,550)
Equity in income from joint ventures (1,189,404) (1,374,749)
Dividends received from joint ventures 3,042,688 5,042,271
Deferred income taxes (54,376) 126,852
Changes in current assets and liabilities:    
Trade, excluding joint ventures (539,925) (308,325)
Trade, joint ventures 104,260 (166,438)
Fees for services provided to joint ventures 641,639 304,258
Income taxes (226,731) (119,978)
Inventories 948,661 516,283
Prepaid expenses and other (252,301) (418,888)
Accounts payable (1,573,008) 98,545
Income tax payable (18,407) (102,074)
Accrued liabilities (254,442) (1,617,099)
Net cash provided by operating activities 2,002,543 3,319,024
CASH FLOWS FROM INVESTING ACTIVITIES:    
Acquisition of Zerust India business, net of cash acquired 0 (5,062,003)
Purchases of property and equipment (409,094) (315,390)
Investments in patents (44,445) (52,197)
Net cash used in investing activities (453,539) (5,429,590)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Net proceeds from line of credit (450,000) 2,500,000
Dividends paid on NTIC common stock (655,645) (643,121)
Proceeds from the exercise of stock options 416,563 139,200
Dividends received by non-controlling interest (80,000) (200,000)
Proceeds from employee stock purchase plan 38,696 38,532
Net cash (used in) provided by financing activities (730,386) 1,834,611
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS: (86,187) 642,879
NET INCREASE IN CASH AND CASH EQUIVALENTS 732,431 366,924
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 5,333,890 7,680,641
CASH AND CASH EQUIVALENTS AT END OF PERIOD $ 6,066,321 $ 8,047,565