Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Cash and cash equivalents	$ 9,339	$ 19,413
Investment securities, available-for-sale	9	13
Accounts receivable, net of allowances of $287 and $588	684	1,116
Costs and estimated earnings in excess of billings on uncompleted contracts	132	137
Inventory	5,042	6,075
Current restricted investments	306	306
Other current assets	978	564
Total current assets	16,490	27,624
Property and equipment, net	3,380	4,169
Restricted investments	1,019	1,189
Intangible assets	2,140	2,233
Other assets	30	18
Total assets	23,059	35,233
Accounts payable	6,785	7,665
Accrued liabilities	4,026	4,135
Billings in excess of costs and estimated earnings on uncompleted contracts	47	81
Current portion of capital lease obligations	35	40
Current portion of long-term debt	89	85
Total current liabilities	10,982	12,006
Capital lease obligations, net of current portion	94	114
Long-term debt, net of current portion	114	159
Deferred rent, net of current portion	497	697
Other long-term liabilities	0	424
Total liabilities	11,687	13,400
Commitments and contingencies
Preferred stock, par value $.001; 25,000 shares authorized; 0 and 0 shares issued and outstanding	0	0
Common stock, par value $.001; 200,000 shares authorized; 108,266 and 102,471 shares issued and outstanding	108	102
Additional paid-in capital	408,450	400,791
Accumulated other comprehensive loss	(34)	(30)
Accumulated deficit	(397,242)	(379,030)
Total shareholders' equity	11,372	21,833
Total liabilities and shareholders' equity	$ 23,059	$ 35,233