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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Current assets |  |
Cash and cash equivalents | $ 5,375 | $ 6,850
Accounts receivable, net of allowance of $373 and $332 | 24 | 1,115
Costs and estimated earnings in excess of billings on uncompleted contracts | 0 | 12
Inventory | 49 | 497
Other current assets | 336 | 1,221
Total current assets | 5,784 | 9,695
Property and equipment, net | 1,065 | 1,205
Restricted cash | 435 | 436
Intangible assets | 1,145 | 1,580
Other assets | 18 | 22
Total assets | 8,447 | 12,938
Current liabilities |  |
Accounts payable | 1,610 | 3,035
Accrued liabilities | 2,455 | 4,007
Deferred revenue | 0 | 609
Billings in excess of costs and estimated earnings on uncompleted contracts | 680 | 98
Warrant liability | 4,902 | 0
Current portion of capital lease obligations | 15 | 48
Current portion of long-term debt | 0 | 67
Total current liabilities | 9,662 | 7,864
Capital lease obligations, net of current portion | 0 | 20
Deferred rent, net of current portion | 481 | 0
Total liabilities | 10,143 | 7,884
Commitments and contingencies (Note 11) |  |
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; 32,069 and 25,237 shares issued and outstanding at December 31, 2013 and 2012, respectively | 32 | 25
Additional paid-in capital | 448,981 | 442,560
Accumulated deficit | (450,709) | (437,531)
Total shareholders' equity (deficit) | (1,696) | 5,054
Total liabilities and shareholders' equity | $ 8,447 | $ 12,938

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