Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 15,338	$ 5,375
Accounts receivable, net of allowance of $373 and $373	135	24
Inventory	49	49
Other current assets	256	336
Total current assets	15,778	5,784
Property and equipment, net	924	1,065
Restricted cash	435	435
Intangible assets	1,112	1,145
Other assets	18	18
Total assets	18,267	8,447
Current liabilities
Accounts payable	1,369	1,610
Accrued liabilities	2,700	2,455
Billings in excess of costs and estimated earnings on uncompleted contracts	347	680
Warrant liability	0	4,902
Current portion of capital lease obligations	5	15
Total current liabilities	4,421	9,662
Deferred rent, net of current portion	533	481
Total liabilities	4,954	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; 42,961 and 32,069 shares issued and outstanding	43	32
Additional paid-in capital	471,997	448,981
Accumulated deficit	(458,727)	(450,709)
Total shareholders' equity (deficit)	13,313	(1,696)
Total liabilities and shareholders' equity	$ 18,267	$ 8,447