Condensed Consolidated Statements of Cash Flow (Unaudited) (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 1,022,183	$ 559,922
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	723,368	742,105
Net gain on disposal of property and equipment	(189,863)	(6,500)
Deferred income taxes	(55,000)	(23,000)
Changes in operating assets and liabilities:
Accounts receivable, net	(1,318,724)	(865,517)
Inventories, net	(518,783)	(449,890)
Other current assets	(25,464)	456,800
Accounts payable	346,128	248,151
Accrued wages and salaries	389,047	332,692
Other accrued expenses	164,938	102,430
Unearned revenue and customer deposits	13,915	2,016
Net cash provided by operating activities	551,745	1,099,209
Cash flows from investing activities:
Capital expenditures	(993,200)	(345,322)
Proceeds from the sale of property and equipment	413,190	6,500
Proceeds from certificates of deposit	4,230,000	6,530,000
Purchases of certificates of deposit	(4,170,000)	(6,321,000)
Net cash used in investing activities	(520,010)	(129,822)
Cash flows from financing activities:
Cash dividends paid	(347,807)	(289,840)
Net cash used in financing activities	(347,807)	(289,840)
Net (decrease) increase in cash and cash equivalents	(316,072)	679,547
Cash and cash equivalents at beginning of period	725,524	569,286
Cash and cash equivalents at end of period	409,452	1,248,833
Supplemental schedule of non-cash investing activities:
Capital expenditures in accounts payable	$ 10,555	$ 22,046