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Capital Stock (Details Textual) (USD $) | 1 Months Ended | 12 Months Ended |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 30, 2011 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 Stockholders Rights Agreement [Member] | Dec. 27, 2012 Stockholders Rights Agreement [Member]
Capital Stock [Line Items] |  |  |  |  |
Common Stock, Shares Authorized (in shares) |  | 75,000,000 | 75,000,000 |  |
Preferred Stock, Shares Authorized (in shares) |  | 5,000,000 | 5,000,000 |  |
Stockholder Rights Exercisable Description |  |  |  | Person becomes an Acquiring Person (unless such Person acquires 50 percent or more of the common stock of the Company then outstanding, as more fully described in the Rights Agreement), the Board of Directors may exchange one share of the Companys common stock for each outstanding Right (other than rights owned by such Person, which would have become void). In addition, if the Company is acquired in a merger or other business combination transaction after a Person becomes an Acquiring Person, all holders of Rights, except the Acquiring Person, may purchase at the Rights then-current exercise price, a number of the acquiring Companys common stock having a market value of twice the exercise price. If the Company receives a qualifying offer (which includes certain all-cash fully financed tender offers or exchange offers for all of the Companys outstanding common stock), under certain circumstances, holders of 10 percent of the Companys outstanding common stock (excluding stock held by the offeror and its affiliates and associates) may direct the Board of Directors to call a special meeting of stockholders to consider a resolution exempting such qualifying offer from the Rights Agreement. |
Redemption Rights Per Share Value (in dollars per share) |  |  |  | $ 0.001 |
Stockholder Rights Plan Expiration Date |  | Jan. 13, 2016 |  |  |
Common Stock, Capital Shares Reserved for Future Issuance |  | 4,523,000 |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  | 20.00%
Purchase of treasury stock (in shares) | 2,000,000 |  |  |  |

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