Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 8,349	$ 5,375
Accounts receivable, net of allowances of $52 and $373	669	24
Inventory	116	49
Other current assets	491	336
Total current assets	9,625	5,784
Property and equipment, net	894	1,065
Restricted cash	435	435
Intangible assets	973	1,145
Other assets	18	18
Total assets	11,945	8,447
Current liabilities
Accounts payable	1,626	1,610
Accrued liabilities	2,729	2,470
Billings on uncompleted contracts in excess of related costs	230	680
Warrant liability	0	4,902
Total current liabilities	4,585	9,662
Deferred rent, net of current portion	488	481
Total liabilities	5,073	10,143
Commitments and contingencies (Note 11)
Shareholders Equity (Deficit)
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; 44,758 and 32,069 shares issued and outstanding at December 31, 2014 and 2013, respectively	45	32
Additional paid-in capital	475,656	448,981
Accumulated deficit	(468,829)	(450,709)
Total shareholders' equity (deficit)	6,872	(1,696)
Total liabilities and shareholders' equity (deficit)	$ 11,945	$ 8,447