Consolidated Balance Sheets (Current Period Unaudited) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 396,114	$ 413,353
Accounts receivable, less allowance for doubtful accounts of approximately $109,000 in 2013 and $162,000 in 2012	2,530,924	2,385,644
Inventories, net	3,267,536	2,671,616
Prepaid expenses	491,874	298,185
Deferred income taxes	293,794	287,417
Total current assets	6,980,242	6,056,215
Property, plant and equipment:
Land	0	500
Buildings and leasehold improvements	577,133	803,021
Machinery and equipment	11,977,174	11,292,235
	12,554,307	12,095,756
Less allowance for depreciation and amortization	(9,033,008)	(8,861,997)
	3,521,299	3,233,759
Other noncurrent assets	38,174	45,173
Deferred income taxes	620,168	628,351
Total assets	11,159,883	9,963,498
Current liabilities:
Accounts payable	2,266,346	1,856,023
Customer deposits	221,958	255,753
Commissions, salaries, wages, and taxes thereon	152,629	157,087
Income taxes payable	6,507	3,888
Revolving line of credit	1,699,742	1,300,000
Current portion of long-term debt	240,000	200,000
Accrued settlement, current portion	156,000
Other accrued expenses	1,331,539	690,584
Total current liabilities	6,074,721	4,463,335
Long-term liabilities:
Long-term debt, net of current portion	960,000	400,000
Accrued settlement, net of current portion	169,000
Pension and other benefits	2,038,487	2,128,210
	3,167,487	2,528,210
Total liabilities	9,242,208	6,991,545
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	271,380	288,395
Retained earnings	3,055,365	4,386,520
Treasury stock at cost, 192,000 shares	(2,112,000)	(2,112,000)
Accumulated other comprehensive loss	(1,476,389)	(1,470,281)
Total stockholders’ equity	1,917,675	2,971,953
Total liabilities and stockholders’ equity	11,159,883	9,963,498
Redeemable Convertible Preferred Stock [Member] | Series C Preferred Stock [Member]
Stockholders’ equity:
Series C redeemable, convertible preferred stock, $1.00 par value: Liquidation preference of $5 per share Authorized shares - 100,000 Issued and outstanding shares - 60,000 in 2013 and 0 in 2012	$ 300,000