Condensed Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 5,230	$ 7,470
Marketable securities	4,933	4,355
Trade accounts receivable, less allowances of $42 and $43, respectively	2,789	2,998
Inventories	2,406	1,556
Prepaid expenses and other current assets	411	414
Total current assets	15,769	16,793
Machinery and equipment	6,028	6,233
Leasehold improvements	332	327
Furniture and fixtures	400	400
	6,760	6,960
Less-accumulated depreciation and amortization	(6,342)	(6,591)
Total property and equipment, net	418	369
Capitalized software, net	181	225
Other assets	450	431
Total assets	16,818	17,818
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accounts payable	999	1,008
Deferred revenue	149	164
Accrued liabilities	1,230	1,231
Accrued compensation	342	393
Total current liabilities	2,720	2,796
Deferred lease obligations	143	180
Long-term debt	3,500	3,500
Total liabilities	6,363	6,476
Commitments and Contingencies
Common stock, $0.10 par value; 100,000,000 shares authorized; 6,999,085 and 6,895,085 shares issued and outstanding, respectively	700	690
Additional paid in capital	45,374	44,232
Retained deficit	(34,759)	(32,708)
Cumulative other comprehensive loss	(860)	(872)
Total shareholders' equity	10,455	11,342
Total liabilities and shareholders' equity	$ 16,818	$ 17,818