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