Condensed Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Condensed Consolidated Statements of Income
Net sales	$ 9,327,643	$ 8,429,201	$ 18,453,379	$ 17,629,519
Cost of goods sold	7,115,077	6,533,152	14,230,552	13,655,181
Gross profit	2,212,566	1,896,049	4,222,827	3,974,338
Selling and administrative expenses	1,328,927	1,280,038	2,680,741	2,671,636
Operating profit	883,639	616,011	1,542,086	1,302,702
Other income:
Interest income	7,000	7,833	15,485	16,685
Gain from disposal of equipment	42,486	27,500	42,486	57,500
Other nonoperating income	4,088	4,088	7,688	8,279
Income before provision for income taxes	937,213	655,432	1,607,745	1,385,166
Provision for income taxes	299,000	215,000	516,000	451,000
Net income	$ 638,213	$ 440,432	$ 1,091,745	$ 934,166
Average common shares outstanding	966,132	966,132	966,132	966,132
Earnings per share	$ 0.66	$ 0.46	$ 1.13	$ 0.97
Cash dividends declared per share	$ 0.15	$ 0.15	$ 0.30	$ 0.30