Consolidated Balance Sheets (USD $)	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 243,885	$ 413,353
Accounts receivable, less allowance for doubtful accounts of approximately $ 151,000 in 2013 and $162,000 in 2012	2,044,033	2,385,644
Inventories, net	2,615,009	2,671,616
Prepaid expenses	273,297	298,185
Deferred income taxes	284,254	287,417
Total current assets	5,460,478	6,056,215
Property, plant and equipment:
Land	500	500
Buildings and leasehold improvements	806,958	803,021
Machinery and equipment	11,261,810	11,292,235
Total property, plant and equipment	12,069,268	12,095,756
Less allowance for depreciation and amortization	(9,029,595)	(8,861,997)
Net property, plant and equipment	3,039,673	3,233,759
Other noncurrent assets	43,414	45,173
Deferred income taxes	630,562	628,351
Total assets	9,174,127	9,963,498
Current liabilities:
Accounts payable	1,823,157	1,856,023
Customer deposits	310,969	255,753
Commissions, salaries, wages, and taxes thereon	108,562	157,087
Income taxes payable	4,819	3,888
Revolving line of credit	970,000	1,300,000
Current portion of long-term debt	700,000	200,000
Accrued settlement, current position	160,000
Other accrued expenses	761,420	690,584
Total current liabilities	4,838,927	4,463,335
Long-term liabilities:
Long-term debt, net of current portion		400,000
Accrued settlement, net of current portion	247,000
Pension and other benefits	2,144,048	2,128,210
Total long term liabilities	2,391,048	2,528,210
Total liabilities	7,229,975	6,991,545
Commitments and contingencies (Note 10)
Stockholders' equity:
Common stock, $1.00 par value: Authorized shares - 4,000,000 Issued shares - 1,879,319 in 2013 and 1,879,319 in 2012; Outstanding shares - 1,687,319 in 2013 and 1,687,319 in 2012	1,879,319	1,879,319
Other capital	288,395	288,395
Retained earnings	3,372,890	4,386,520
Treasury stock at cost, 192,000 shares	(2,112,000)	(2,112,000)
Accumulated other comprehensive loss	(1,484,452)	(1,470,281)
Total stockholders' equity	1,944,152	2,971,953
Total liabilities and stockholders' equity	$ 9,174,127	$ 9,963,498