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v3.20.1

Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Operating activities: |  |
Net income | $ 5,513,608 | $ 4,598,350
Adjustments to reconcile net income to net cash provided by operating activities |  |
Depreciation | 2,181,060 | 2,011,675
Amortization | 1,251,662 | 1,217,525
Stock compensation expense | 968,467 | 869,055
Deferred income taxes | 162,637 | 396,233
Non-cash lease expense | 19,222 |
Provision for doubtful accounts | 290,128 | 156,000
Changes in operating assets and liabilities |  |
Accounts receivable | (784,562) | 651,988
Inventories | 2,089,861 | (1,580,151)
Prepaid expenses and other current assets | 666,070 | 573,604
Accounts payable | (1,525,060) | (3,066,106)
Other accrued liabilities | 3,869,138 | (1,352,904)
Total adjustments | 9,188,623 | (123,081)
Net cash provided by operating activities | 14,702,231 | 4,475,269
Investing activities: |  |
Purchase of property, plant and equipment | (1,680,479) | (2,850,993)
Purchase of intellectual property |  | (379,921)
Net cash used by investing activities | (1,680,479) | (3,230,914)
Financing activities: |  |
Net repayments of long-term debt | (7,042,708) | (3,167,233)
Repayments on mortgage | (266,667) | (266,667)
Distributions to shareholders | (1,608,956) | (1,484,829)
Cash settlement of stock options | (1,687,782) | (768,075)
Purchase of treasury stock |  | (365,149)
Net cash used by financing activities | (10,606,113) | (6,051,953)
Effect of exchange rate changes | (2,799) | (121,629)
Net increase (decrease) in cash and cash equivalents | 2,412,841 | (4,929,227)
Cash and cash equivalents at beginning of year | 4,409,042 | 9,338,269
Cash and cash equivalents at end of year | 6,821,883 | 4,409,042
Supplemental cash flow information: |  |
Cash paid for income taxes | 422,339 | 887,592
Cash paid for interest expense | $ 1,863,961 | $ 1,855,356

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