Condensed Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 6,297	$ 7,470
Marketable securities	4,435	4,355
Trade accounts receivable, less allowances of $41 and $43, respectively	3,352	2,998
Inventories	1,872	1,556
Prepaid expenses and other current assets	510	414
Total current assets	16,466	16,793
Machinery and equipment	5,996	6,233
Leasehold improvements	332	327
Furniture and fixtures	400	400
	6,728	6,960
Less-accumulated depreciation and amortization	(6,335)	(6,591)
Total property and equipment, net	393	369
Capitalized software, net	192	225
Other assets	408	431
Total assets	17,459	17,818
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accounts payable	1,515	1,008
Deferred revenue	103	164
Accrued liabilities	953	1,231
Accrued compensation	160	393
Total current liabilities	2,731	2,796
Deferred lease obligations	163	180
Long-term debt	3,500	3,500
Total liabilities	6,394	6,476
Commitments and Contingencies
Shareholders’ Equity
Common stock, $0.10 par value; 100,000,000 shares authorized; 6,924,960 and 6,895,085 shares issued and outstanding, respectively	692	690
Additional paid in capital	44,889	44,232
Retained deficit	(33,637)	(32,708)
Cumulative other comprehensive loss	(879)	(872)
Total shareholders' equity	11,065	11,342
Total liabilities and shareholders' equity	$ 17,459	$ 17,818