CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 9,845,298	$ 7,372,756	$ 8,854,765
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,941,905	6,264,246	5,897,100
Deferred income taxes	989,473	750,363	62,948
Loss (gain) on disposal of fixed assets	138,056	52,293	(50,949)
Gain on acquisition		(601,975)
Stock compensation expense	307,102	458,800	122,500
Change in assets and liabilities:
Receivables	(6,888,027)	(3,182,751)	824,438
Inventories	(7,065,372)	(9,813,065)	(2,177,197)
Income tax receivable	242,228	(242,228)
Other current assets	(24,035)	(319,340)	1,598,879
Other assets	109,208	68,214	146,766
Accounts payable	4,004,111	(4,779,055)	3,769,551
Accrued and other liabilities	4,380,101	1,518,524	(1,055,248)
Net cash provided by (used in) operating activities	12,980,048	(2,453,218)	17,993,553
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of fixed assets	(7,442,086)	(7,717,102)	(6,145,390)
Proceeds from sales of fixed assets	63,012	47,625	118,398
Acquisition of business assets		(2,229,000)
Investment in trademarks and patents	(9,446)	(68,452)	(55,613)
Net cash used in investing activities	(7,388,520)	(9,966,929)	(6,082,605)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility	75,190,968	78,622,969	63,140,815
Repayments of revolving credit facility	(77,308,793)	(63,696,111)	(74,679,475)
Debt financing costs	(54,647)	(58,738)
Dividends paid on common stock	(3,017,979)	(2,254,935)
Net cash (used in) provided by financing activities	(5,190,451)	12,613,185	(11,538,660)
INCREASE IN CASH AND CASH EQUIVALENTS	401,077	193,038	372,288
CASH AND CASH EQUIVALENTS:
BEGINNING OF PERIOD	4,215,617	4,022,579	3,650,291
END OF PERIOD	$ 4,616,694	$ 4,215,617	$ 4,022,579