Condensed Consolidated Statements of Cash Flow (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income	$ 1,254,877	$ 606,025
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	971,496	1,000,354
Net (gain) loss on the sale of property and equipment	(192,544)	6,651
Deferred income taxes	14,000	46,000
Changes in operating assets and liabilities:
Accounts receivable, net	(381,345)	(203,418)
Inventories, net	(901,886)	(556,218)
Other current assets	5,280	471,503
Accounts payable	130,235	(285,994)
Accrued wages and salaries	(30,640)	35,176
Other accrued expenses	141,471	76,862
Unearned revenue and customer deposits	66,954	(17,548)
Net cash provided by operating activities	1,077,898	1,179,393
Cash flows from investing activities:
Capital expenditures	(1,522,539)	(675,080)
Proceeds from the sale of property and equipment	416,190	7,700
Proceeds from certificates of deposit	5,630,000	8,521,000
Purchases of certificates of deposit	(5,130,000)	(8,471,000)
Net cash used in investing activities	(606,349)	(617,380)
Cash flows from financing activities:
Cash dividends paid	(492,728)	(405,775)
Net cash used in financing activities	(492,728)	(405,775)
Net (decrease) increase in cash and cash equivalents	(21,179)	156,238
Cash and cash equivalents at beginning of period	725,524	569,286
Cash and cash equivalents at end of period	704,345	725,524
Net cash paid (refunds received) for income taxes	490,846	(264,856)
Supplemental schedule of non-cash investing activities:
Capital expenditures in accounts payable	$ 89,250	$ 12,028