Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 12,464	$ 5,375
Accounts receivable, net	54	24
Inventory	31	49
Other current assets	547	336
Total current assets	13,096	5,784
Property and equipment, net	893	1,065
Restricted cash	435	435
Intangible assets	1,079	1,145
Other assets	18	18
Total assets	15,521	8,447
Current liabilities
Accounts payable	1,715	1,610
Accrued liabilities	2,118	2,455
Billings in excess of costs and estimated earnings on uncompleted contracts	120	680
Warrant liability	0	4,902
Current portion of capital lease obligations	0	15
Total current liabilities	3,953	9,662
Deferred rent, net of current portion	557	481
Total liabilities	4,510	10,143
Commitments and contingencies (Note 6)
Shareholders equity
Preferred stock, par value $.001; 25,000 shares authorized; 0 and 0 shares issued and outstanding	0	0
Common stock, par value $.001; 100,000 shares authorized; 43,507 and 32,069 shares issued and outstanding	44	32
Additional paid-in capital	473,095	448,981
Accumulated deficit	(462,128)	(450,709)
Total shareholders' equity (deficit)	11,011	(1,696)
Total liabilities and shareholders' equity	$ 15,521	$ 8,447