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Consolidated Statements Of Cash Flows (USD $) | 6 Months Ended
--- | ---
Jun. 30, 2012 | Jun. 30, 2011
Cash flows from operating activities: |  |
Net income | $ 3,144,116 | $ 2,191,313
Adjustments to reconcile net income to net cash flows from operating activities, net of acquisition: |  |
Depreciation and amortization | 1,189,563 | 1,159,123
Loss (Gain) on sale of investments, net | (22,390) | 2,056
Loss on disposition of equipment | 0 | 0
Impairment of investments | 0 | 0
Deferred income taxes | (480,311) | (156,040)
Bad debt expense | 172,303 | 20,000
(Increase) decrease in operating assets: |  |
Accounts receivable | (1,610,208) | (2,117,792)
Other receivables | 120,195 | 94,855
Inventories | (472,240) | (1,622,777)
Refundable income taxes | 41,316 | 906,748
Prepaid expenses and other current assets | (17,230) | (41,551)
Increase (decrease) in operating liabilities: |  |
Accounts payable | 383,612 | (8,646)
Accrued expenses | 39,687 | 42,599
Income taxes payable | 1,639,515 | 378,482
Net cash provided by operating activities | 4,127,928 | 848,370
Cash flows from investing activities: |  |
Purchases of investments | (743,675) | (582,697)
Proceeds from sale of investments | 658,233 | 532,640
Investments in certificates of deposits | 0 | (50,000)
Proceeds from redemption of certificates of deposit | 0 | 0
Purchases of property and equipment | (478,428) | (747,250)
Net cash used in investing activities | (563,870) | (847,307)
Cash flows from financing activities: |  |
Proceeds of note payable | 0 | 250,000
Checks written in excess of bank balances | 119,557 | 367,840
Purchases of treasury stock | (340,444) | (971,798)
Repayment of notes payable | (1,311,679) | (1,478,521)
Dividends paid | (1,146,317) | 0
Net cash used in financing activities | (2,678,883) | (1,832,479)
Net (decrease) increase in cash and cash equivalents | 885,175 | (1,831,416)
Cash and cash equivalents at the beginning of the period | 1,115,150 | 3,229,939
Cash and cash equivalents at the end of the period | $ 2,000,325 | $ 1,398,523

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