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The Company and Summary of Significant Accounting Policies (Details) (USD $) | 1 Months Ended | 12 Months Ended | 132 Months Ended
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Feb. 25, 2013 | Dec. 31, 2012 Segment | Dec. 31, 2011 | Dec. 31, 2012
The Company and Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |
Anticipated time to start AF Trial |  | 6 months |  |
Loss from operations |  | $ (4,319,000) | $ (7,361,000) | $ (99,143,000)
Fund raised through sale of common stock |  | 1,528,000 | 4,726,000 | 14,109,000
New funds raised by the company |  | 1,500,000 |  | 1,500,000
Cash flows from operations |  | (4,078,000) | (6,959,000) | (97,421,000)
Reverse stock split | 1 for 6 reverse split | 1 for 20 reverse stock split |  |
Merger conversion ratio |  | 0.16698070 |  |
Cash and cash equivalents maturity period |  | 90 days or less |  |
Revenue generated by the company |  | $ 0 |  |
Number of segments |  | 1 |  |
Minimum [Member] |  |  |  |
Company and Summary of Significant Accounting Policies Table [Line Items] |  |  |  |
Number of patients company plans to enroll |  | 200 |  |
Maximum [Member] |  |  |  |
Company and Summary of Significant Accounting Policies Table [Line Items] |  |  |  |
Number of patients company plans to enroll |  | 420 |  |

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