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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2012
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event On January 4, 2013, the underwriters for the Company's public offering of common stock exercised in full their over-allotment option to purchase an additional 525,000 shares of common stock at a price of $17.25 per share to the public. The sale of the additional shares resulted in additional net proceeds to the Company of $8.5 million after deducting the underwriting discount and estimated expenses.