Consolidated Balance Sheets (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Cash and cash equivalents	$ 9,369	$ 19,413
Investment securities, available-for-sale	8	13
Accounts receivable, net of allowances of $308 and $588	877	1,116
Costs and estimated earnings in excess of billings on uncompleted contracts	257	137
Inventory	4,443	6,075
Current restricted investments	0	306
Other current assets	1,120	564
Total current assets	16,074	27,624
Property and equipment, net	2,736	4,169
Restricted investments	1,019	1,189
Intangible assets	2,094	2,233
Other assets	30	18
Total assets	21,953	35,233
Accounts payable	6,301	7,665
Accrued liabilities	4,432	4,135
Billings in excess of costs and estimated earnings on uncompleted contracts	50	81
Current portion of capital lease obligations	40	40
Current portion of long-term debt	91	85
Total current liabilities	10,914	12,006
Capital lease obligations, net of current portion	84	114
Long-term debt, net of current portion	91	159
Deferred rent, net of current portion	253	697
Other long-term liabilities	0	424
Total liabilities	11,342	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; 117,793 and 102,471 shares issued and outstanding	118	102
Additional paid-in capital	415,560	400,791
Accumulated other comprehensive loss	(35)	(30)
Accumulated deficit	(405,032)	(379,030)
Total shareholders' equity	10,611	21,833
Total liabilities and shareholders' equity	$ 21,953	$ 35,233