Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 8,113	$ 4,772
Marketable securities	3,281	6,005
Trade accounts receivable, less allowances of $53 and $70, respectively	4,871	4,633
Inventories	1,535	1,645
Prepaid expenses and other current assets	343	623
Total current assets	18,143	17,678
Machinery and equipment	6,205	6,840
Leasehold improvements	327	327
Furniture and fixtures	400	398
Total property and equipment, gross	6,932	7,565
Less-accumulated depreciation and amortization	(6,540)	(7,151)
Total property and equipment, net	392	414
Capitalized software, net	291	485
Other assets	621	737
Total assets	19,447	19,314
Liabilities
Accounts payable	1,700	1,388
Deferred revenue	154	39
Accrued liabilities	1,122	2,486
Accrued compensation	417	648
Total current liabilities	3,393	4,561
Deferred lease obligations	196	243
Long-term debt	3,500	3,500
Total liabilities	7,089	8,304
Commitments and Contingencies
Shareholders' Equity
Common stock, $0.10 par value; 100,000,000 shares authorized; 6,895,085 and 6,815,600 shares issued and outstanding, respectively	690	682
Additional paid in capital	44,146	43,355
Retained deficit	(31,596)	(32,203)
Cumulative other comprehensive loss	(882)	(824)
Total shareholders' equity	12,358	11,010
Total liabilities and shareholders' equity	$ 19,447	$ 19,314