Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents (Note A)	$ 5,192	$ 7,183
Restricted cash (Note C)	0	1,500
Accounts receivable, less allowances of $43 and $42, respectively (Note A)	3,266	3,237
Inventories, net (Notes A and B)	4,198	4,629
Prepaid expenses and other current assets	278	405
Total Current Assets	12,934	16,954
Property, Plant and Equipment (Note A)
Land	633	633
Buildings and improvements	3,922	3,908
Machinery and equipment	16,314	15,980
Gross property, plant and equipment	20,869	20,521
Less: accumulated depreciation	(17,322)	(16,535)
Net property, plant, and equipment	3,547	3,986
Intangible assets, net	528	76
Other assets, net	253	247
Total Assets	17,262	21,263
LIABILITIES AND STOCKHOLDERS' EQUITY
Note payable to bank	0	1,181
Accounts payable	1,719	1,978
Accrued compensation and commissions expense	681	992
Accrued warranty expense	242	22
Other accrued expenses	383	335
Total Current Liabilities	3,025	4,508
Commitments and Contingencies (Notes C and J)
Stockholders' Equity:
Common stock, $0.01 par value - 10,000,000 shares authorized; 2,696,201 shares issued and 2,616,485 shares outstanding at December 31, 2014, and 2,674,448 shares issued and 2,594,784 shares outstanding at December 31, 2013	27	27
Additional paid-in capital	28,901	28,593
Accumulated deficit	(14,163)	(11,338)
Treasury stock, 79,716 and 79,664 shares held in treasury at cost at December 31, 2014 and 2013, respectively	(572)	(572)
Accumulated other comprehensive income	44	45
Total Stockholders' Equity	14,237	16,755
Total Liabilities and Stockholders' Equity	$ 17,262	$ 21,263