Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 5,596,070	$ 4,752,601	$ 4,160,257
Income (loss) from discontinued operations		(1,368)	1,766
	5,596,070	4,753,969	4,158,491
provided by operating activities -
Depreciation and amortization	1,068,226	1,016,561	972,409
Loss on disposal or abandonment of assets	21,092	84,168	49,154
Non-cash stock-based compensation	10,000	33,156	41,692
Deferred income taxes	(120,531)	256,544	(90,520)
Other	(15,227)	(106,345)	150,203
business acquisitions:
Accounts receivable-trade, net	505,807	(74,940)	(56,736)
Inventory	(5,922,533)	295,777	(3,370,202)
Income taxes	(525,192)	84,216	186,940
Other current assets	18,546	107,742	(264,317)
Accounts payable-trade	(10,070)	374,876	62,788
Accrued expenses and other liabilities	1,287,607	(252,045)	905,092
Total adjustments	(3,682,275)	1,819,710	(1,413,497)
Net cash provided by continuing operating activities	1,913,795	6,573,679	2,744,994
Cash provided used by discontinued operating activities		(1,067)	(23,751)
Net cash provided by operating activities	1,913,795	6,572,612	2,721,243
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(2,686,221)	(1,100,523)	(1,553,339)
Purchases of certificates of deposit		(87,893)	(2,572,593)
Proceeds from maturities of certificates of deposit	423,893	1,285,593	5,968,000
Proceeds from sale of assets	1,230	26,263	7,570
Decrease (increase) in other assets	4,545	(21,707)	(4,612)
Net cash provided by (used in) continuing investing activities	(2,256,553)	101,733	1,845,026
Net cash provided by (used in) investing activities	(2,256,553)	101,733	1,845,026
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on notes payable and long-term debt	(202,500)	(202,500)	(202,500)
Payment of cash dividend	(2,536,131)		(7,690,832)
Repurchase of common stock (treasury stock)			(441,419)
Proceeds from issuance of common stock	20,980		170,266
Net cash used in continuing financing activities	(2,717,651)	(202,500)	(8,164,485)
Net cash used in financing activities	(2,717,651)	(202,500)	(8,164,485)
NET INCREASE (DECREASE) IN CASH	(3,060,409)	6,471,845	(3,598,216)
CASH, beginning of period	10,765,591	4,293,746	7,891,962
CASH, end of period	7,705,182	10,765,591	4,293,746
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest paid during the period	240,934	248,576	265,405
Income tax paid during the period, net of (refunds)	$ 4,004,510	$ 2,437,701	$ 2,208,819