CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 39,160	$ 106,833
Investments	930,665	924,016
Accounts receivable, net	26,873,415	22,040,297
Inventories	45,456,056	38,134,862
Deferred income taxes	1,454,661
Other current assets	7,046,529	8,303,579
Total current assets	81,800,486	69,509,587
Property, plant and equipment, at cost	85,564,176	81,778,886
Less, Accumulated depreciation and amortization	49,509,613	48,248,829
Property, plant and equipment, net	36,054,563	33,530,057
Other assets	1,415,934	1,683,718
Total assets	119,270,983	104,723,362
Current liabilities:
Current maturities of long-term debt	241,070	246,192
Trade accounts payable	19,983,370	21,424,434
Accrued income taxes	837,112	719,611
Other accrued liabilities	13,167,357	11,697,311
Total current liabilities	34,228,909	34,087,548
Long-term debt	20,999,097	15,702,467
Deferred income taxes	1,012,344
Total liabilities	56,240,350	49,790,015
Stockholders' equity	63,030,633	54,933,347
Total liabilities and stockholders' equity	$ 119,270,983	$ 104,723,362