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Consolidated Statements Of Cash Flows (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Cash flows from operating activities: |  |
Net income | $ 660,178 | $ 2,365,639
Adjustments to reconcile net income to net cash flows from operating activities: |  |
Depreciation and amortization | 562,280 | 571,967
Loss (gain) on sale of investments, net | (4,808) | (64,335)
Deferred income taxes | (196,401) | (192,090)
Bad Debt expense | 126,049 | 51,819
Loss (Gain) on sale of equipment |  |
(Increase) decrease in operating assets: |  |
Accounts receivable | (468,826) | (3,244,063)
Other receivables | 11,644 | 3,660
Inventories | (456,876) | (1,141,713)
Refundable income taxes | (1,565,376) |
Prepaid expenses and other current assets | 88,468 | 4,311
Increase (decrease) in operating liabilities: |  |
Accounts payable | 235,820 | 2,209,076
Accrued expenses | 1,448,110 | 42,206
Income taxes payable |  | 208,282
Net cash provided by operating activities | 440,262 | 814,759
Cash flows from investing activities: |  |
Purchases of investments | (814,804) | (1,271,516)
Proceeds from sale of investments | 554,609 | 1,170,271
Redemption of certificates of deposit | 15,000 | 200,000
Purchases of property and equipment | (807,894) | (324,608)
Proceeds from sale of equipment |  |
Net cash (used in) provided by investing activities | (1,053,089) | (225,853)
Cash flows from financing activities: |  |
Repayment of notes payable | (219,073) | (135,175)
Net cash provided (used in) financing activities | (219,073) | (135,175)
Net (decrease) increase in cash and cash equivalents | (831,900) | 453,731
Cash and cash equivalents at the beginning of the period | 3,306,608 | 2,286,226
Cash and cash equivalents at the end of the period | $ 2,474,708 | $ 2,739,957

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