Condensed Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Consolidated Statements of Income
Net sales	$ 9,461,778	$ 8,537,639	$ 27,915,157	$ 26,167,158
Cost of goods sold	6,931,307	6,612,846	21,161,859	20,268,027
Gross profit	2,530,471	1,924,793	6,753,298	5,899,131
Selling and administrative expenses	1,391,902	1,263,236	4,072,643	3,934,872
Operating profit	1,138,569	661,557	2,680,655	1,964,259
Other income:
Interest income	7,801	8,185	23,286	24,870
Gain from disposal of equipment	74,235		116,721	57,500
Other nonoperating income	3,600	3,600	11,288	11,879
Income before provision for income taxes	1,224,205	673,342	2,831,950	2,058,508
Provision for income taxes	404,000	210,000	920,000	661,000
Net income	$ 820,205	$ 463,342	$ 1,911,950	$ 1,397,508
Average common shares outstanding	966,132	966,132	966,132	966,132
Earnings per share	$ 0.85	$ 0.48	$ 1.98	$ 1.45
Cash dividends declared per share	$ 0.15	$ 0.15	$ 0.45	$ 0.45