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v3.20.1

STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cash flows from operating activities |  |  |
Net income (loss) | $ 3,148,234 | $ (1,339,943) | $ (3,736,038)
Adjustments to reconcile net income (loss) to net cash provided (used) by operating activities: |  |  |
Depreciation and amortization | 852,080 | 886,814 | 834,951
Realized gains on investments | (7,925) |  |
Net unrealized gains on investments | (129,315) |  |
Share-based Compensation |  |  | 672,223
Inventories reserve |  | (297,731) |
Provision for doubtful accounts |  | 47,793 | 24,272
(Increase) decrease in assets: |  |  |
Accounts receivable | (1,652,015) | 145,407 | (1,861,990)
Inventories | 94,502 | (1,041,202) | 811,063
Other current assets | 9,602 | (226,649) | (225,606)
Income taxes receivable | 100,937 | (13,266) | (188,456)
Other assets | 77,541 |  |
Increase (decrease) in liabilities: |  |  |
Accounts payable | (362,072) | 411,927 | 485,994
Other accrued liabilities | 55,150 | 699,030 | (205,342)
Insurance proceeds |  | (466,293) | 466,293
Income taxes payable | 7,919 | (1,382) |
Net cash provided (used) by operating activities | 2,194,638 | (1,195,495) | (2,922,636)
Cash flows from investing activities: |  |  |
Purchase of property, plant, and equipment | (632,078) | (382,156) | (91,878)
Purchase of debt and equity securities | (7,360,398) | (2,986,156) |
Proceeds from the sales of debt and equity securities | 2,712,134 |  |
Net cash used by investing activities | (5,280,342) | (3,368,312) | (91,878)
Cash flows from financing activities |  |  |
Repayments of long-term debt | (407,014) | (446,350) | (436,280)
Proceeds from sale of common stock |  |  | 2,350,100
Payment of preferred stock dividends | (219,825) | (220,450) | (220,450)
Net cash used by financing activities | (626,839) | (666,800) | 1,693,370
Net decrease in cash and cash equivalents | (3,712,543) | (5,230,607) | (1,321,144)
Cash and cash equivalents at: |  |  |
Beginning of period | 9,647,292 | 14,877,899 | 16,199,043
End of period | 5,934,749 | 9,647,292 | 14,877,899
Supplemental schedule of cash flow information: |  |  |
Interest paid | 166,897 | 177,190 | 210,761
Income taxes paid |  | 1,173 | 1,031
Supplemental schedule of noncash investing and financing activities: |  |  |
Preferred dividends declared, not paid | 54,800 | $ 55,113 | $ 55,113
Conversion of preferred stock to common stock | $ 8,500 |  |

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