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Other Financial Statement Information (Accrued Liabilities) (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 | Dec. 31, 2012
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Other Financial Statement Information [Abstract] |  |
Compensation | $ 285 | $ 254
Accrued rent | 186 | 208
Sales tax and other | 48 | 65
Total accrued liabilities | $ 519 | $ 527

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