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Consolidated Statements of Cash Flows (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income $ 4,752,601 $ 4,160,257 $ 3,318,057
Income (loss) from discontinued operations (1,368) 1,766 56,914
4,753,969 4,158,491 3,261,143
Adjustments to reconcile net income to net cash provided by operating activities -      
Depreciation and amortization 1,016,561 972,409 1,125,009
Loss on disposal or abandonment of assets 84,168 49,154 21,540
Impairment of equipment     343,543
Non-cash stock-based compensation 33,156 41,692 2,540
Deferred income taxes 256,544 (90,520) 40,776
Other (106,345) 150,203 339,305
Net changes in assets and liabilities, net of effect of business acquisitions:      
Accounts receivable-trade, net (74,940) (56,736) (99,994)
Inventory 295,777 (3,370,202) (900,466)
Income taxes 84,216 186,940 147,310
Other current assets 107,742 (264,317) (14,334)
Accounts payable-trade 374,876 62,788 36,455
Accrued expenses and other liabilities (252,045) 905,092 810,564
Total adjustments 1,819,710 (1,413,497) 1,852,248
Net cash provided by continuing operating activities 6,573,679 2,744,994 5,113,391
Cash provided from (used by) discontinued operating activities (1,067) (23,751) 161,070
Net cash provided by operating activities 6,572,612 2,721,243 5,274,461
CASH FLOWS FROM INVESTING ACTIVITIES:      
Purchase of property and equipment (1,100,523) (1,553,339) (791,565)
Purchases of certificates of deposit (87,893) (2,572,593) (8,671,000)
Proceeds from maturities of certificates of deposit 1,285,593 5,968,000 6,665,000
Proceeds from sale of assets 26,263 7,570 2,510
Decrease (increase) in other assets (21,707) (4,612) (1,847)
Net cash provided by (used in) continuing investing activities 101,733 1,845,026 (2,796,902)
Net cash provided by (used in) investing activities 101,733 1,845,026 (2,796,902)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Payments on notes payable and long-term debt (202,500) (202,500) (202,500)
Payments on capital lease obligations     (593,949)
Payment of dividend   (7,690,832)  
Repurchase of common stock (treasury stock)   (441,419) (1,624,264)
Proceeds from issuance of common stock and warrants   170,266 24,818
Net cash used in continuing financing activities (202,500) (8,164,485) (2,395,895)
Net cash used in financing activities (202,500) (8,164,485) (2,395,895)
NET INCREASE (DECREASE) IN CASH 6,471,845 (3,598,216) 81,664
CASH, beginning of period 4,293,746 7,891,962 7,810,298
CASH, end of period 10,765,591 4,293,746 7,891,962
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:      
Interest paid during the period 248,576 265,405 297,864
Income tax paid during the period, net of (refunds) $ 2,437,701 $ 2,208,819 $ 1,622,273