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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Cash and cash equivalents | $ 6,850 | $ 13,075
Accounts receivable, net of allowances of $332 and $243 | 1,115 | 463
Costs and estimated earnings in excess of billings on uncompleted contracts | 12 | 70
Inventory | 497 | 4,254
Other current assets | 1,221 | 793
Total current assets | 9,695 | 18,655
Property and equipment, net | 1,205 | 2,347
Restricted cash | 436 | 786
Intangible assets | 1,580 | 2,048
Other assets | 22 | 34
Total assets | 12,938 | 23,870
Accounts payable | 3,035 | 7,341
Accrued liabilities | 4,007 | 5,113
Deferred revenue | 609 | 0
Billings in excess of costs and estimated earnings on uncompleted contracts | 98 | 156
Current portion of capital lease obligations | 48 | 39
Current portion of long-term debt | 67 | 93
Total current liabilities | 7,864 | 12,742
Capital lease obligations, net of current portion | 20 | 72
Long-term debt, net of current portion | 0 | 67
Deferred rent, net of current portion | 0 | 187
Total liabilities | 7,884 | 13,068
Commitments and contingencies (Note 13) |  |
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; 25,237 and 17,019 shares issued and outstanding at December 31, 2012 and 2011, respectively | 25 | 17
Additional paid-in capital | 442,560 | 425,658
Accumulated other comprehensive loss | 0 | (35)
Accumulated deficit | (437,531) | (414,838)
Total shareholders' equity | 5,054 | 10,802
Total liabilities and shareholders' equity | $ 12,938 | $ 23,870

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