Condensed Consolidated Statements of Cash Flow (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 704,543	$ 453,929
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation	481,542	491,820
Net gain on disposal of property and equipment	(189,063)	(6,500)
Deferred income taxes	(54,000)	(46,000)
Changes in operating assets and liabilities:
Accounts receivable, net	(1,029,393)	(942,981)
Inventories, net	(585,583)	(308,607)
Other current assets	61,831	55,848
Accounts payable	193,225	163,667
Accrued wages and salaries	213,577	411,085
Other accrued expenses	56,397	41,200
Unearned revenue and customer deposits	10,044	30,143
Net cash (used in) provided by operating activities	(136,880)	343,604
Cash flows from investing activities:
Capital expenditures	(663,775)	(151,000)
Proceeds from the sale of property and equipment	412,390	6,500
Proceeds from certificates of deposit	2,155,000	4,700,000
Purchases of certificates of deposit	(995,000)	(4,496,000)
Net cash provided by investing activities	908,615	59,500
Cash flows from financing activities:
Cash dividends paid	(231,872)	(193,227)
Net cash used in financing activities	(231,872)	(193,227)
Net decrease in cash and cash equivalents	539,863	209,877
Cash and cash equivalents at beginning of period	725,524	569,286
Cash and cash equivalents at end of period	1,265,387	779,163
Supplemental schedule of non-cash investing activities:
Capital expenditures in accounts payable	$ 66,496