Condensed Consolidated Balance Sheets-Unaudited (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 5,048	$ 5,192
Accounts receivable, less allowances of $47 and $43, respectively	3,152	3,266
Inventories, net (Note C)	4,030	4,198
Prepaid expenses and other current assets	317	278
Total Current Assets	12,547	12,934
Property, Plant and Equipment
Land	633	633
Buildings and improvements	3,922	3,922
Machinery and equipment	16,570	16,314
Gross property, plant and equipment	21,125	20,869
Less: accumulated depreciation	(17,524)	(17,322)
Net property, plant, and equipment	3,601	3,547
Intangible assets, net (Note D)	515	528
Other assets, net	250	253
Total Assets	16,913	17,262
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	1,548	1,719
Accrued compensation and commissions expense	733	681
Accrued warranty expense	213	242
Other accrued expenses	334	383
Total Current Liabilities	2,828	3,025
Stockholders' Equity:
Common stock, $0.01 par value - 10,000,000 shares authorized; 2,696,149 shares issued and 2,616,485 shares outanding at March 31, 2015 and 2,696,201 shares issued and 2,616,485 shares outstanding at December 31, 2014	27	27
Additional paid-in capital	28,914	28,901
Accumulated deficit	(14,341)	(14,163)
Treasury stock: 79,664 and 79,716 shares held in treasury at cost at March 31, 2015 and December 31, 2014, respectively	(572)	(572)
Accumulated other comprehensive income	57	44
Total Stockholders' Equity	14,085	14,237
Total Liabilities and Stockholders' Equity	$ 16,913	$ 17,262