Consolidated Balance Sheets (USD $)	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 413,353	$ 525,632
Accounts receivable, less allowance for doubtful accounts of $162,000 in 2012 and $149,000 in 2011	2,385,644	1,754,959
Inventories, net	2,671,616	2,845,563
Prepaid expenses	298,185	330,403
Deferred income taxes	287,417	278,437
Total current assets	6,056,215	5,734,994
Property, plant and equipment:
Land	500	500
Buildings and leasehold improvements	803,021	754,922
Machinery and equipment	11,292,235	10,891,820
Total property, plant and equipment	12,095,756	11,647,242
Less allowance for depreciation and amortization	(8,861,997)	(8,087,988)
Net property, plant and equipment	3,233,759	3,559,254
Other noncurrent assets	45,173	47,259
Deferred income taxes	628,351	727,118
Total assets	9,963,498	10,068,625
Current liabilities:
Accounts payable	1,856,023	1,627,489
Customer deposits	255,753	398,167
Commissions, salaries, wages, and taxes thereon	157,087	162,507
Income taxes payable	3,888	69,718
Revolving line of credit	1,300,000	700,000
Current portion of long-term debt	200,000	200,000
Other accrued expenses	690,584	491,188
Total current liabilities	4,463,335	3,649,069
Long-term liabilities:
Long-term debt, net of current portion	400,000	600,000
Pension and other benefits	2,128,210	2,051,054
Total long term liabilities	2,528,210	2,651,054
Total liabilities	6,991,545	6,300,123
Commitments and contingencies (Note 15)
Stockholders' equity:
Common stock, $1 par value: Authorized shares - 4,000,000 Issued shares - 1,879,319 and 1,871,999 in 2012 and 2011, respectively Outstanding shares - 1,687,319 and 1,679,999 in 2012 and 2011, respectively	1,879,319	1,871,999
Other capital	288,395	284,478
Retained earnings	4,386,520	5,001,097
Treasury stock at cost (192,000 shares)	(2,112,000)	(2,112,000)
Accumulated other comprehensive loss	(1,470,281)	(1,277,072)
Total stockholders' equity	2,971,953	3,768,502
Total liabilities and stockholders' equity	$ 9,963,498	$ 10,068,625