Consolidated Balance Sheets (USD $)	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 318,281	$ 413,353
Accounts receivable, less allowance for doubtful accounts of approximately $97,000 in 2013 and $162,000 in 2012	2,264,552	2,385,644
Inventories, net	2,654,651	2,671,616
Prepaid expenses	514,948	298,185
Deferred income taxes	272,267	287,417
Total current assets	6,024,699	6,056,215
Property, plant and equipment:
Land	500	500
Buildings and leasehold improvements	838,855	803,021
Machinery and equipment	11,227,685	11,292,235
Total property, plant and equipment	12,067,040	12,095,756
Less allowance for depreciation and amortization	(9,188,709)	(8,861,997)
Net property, plant and equipment	2,878,331	3,233,759
Other noncurrent assets	43,414	45,173
Deferred income taxes	640,344	628,351
Total assets	9,586,788	9,963,498
Current liabilities:
Accounts payable	2,040,607	1,856,023
Customer deposits	200,717	255,753
Commissions, salaries, wages, and taxes thereon	136,158	157,087
Income taxes payable	11,072	3,888
Revolving line of credit	1,520,000	1,300,000
Current portion of long-term debt	650,000	200,000
Accrued settlement, current portion	174,000
Other accrued expenses	844,377	690,584
Total current liabilities	5,576,931	4,463,335
Long-term liabilities:
Long-term debt, net of current portion		400,000
Accrued settlement, net of current portion	208,000
Pension and other benefits	2,129,094	2,128,210
Total long term liabilities	2,337,094	2,528,210
Total liabilities	7,914,025	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	3,109,905	4,386,520
Treasury stock at cost, 192,000 shares	(2,112,000)	(2,112,000)
Accumulated other comprehensive loss	(1,492,856)	(1,470,281)
Total stockholders' equity	1,672,763	2,971,953
Total liabilities and stockholders' equity	$ 9,586,788	$ 9,963,498