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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2013
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events Public Offering On October 3, 2013, the Company entered into an Underwriting Agreement (the “Underwriting Agreement”) with Aegis Capital Corp. (“Aegis”), providing for the offer and sale in a firm commitment underwritten public offering (the “Offering”) of 5,000,000 shares of the Company's common stock, par value $0.001 per share at a public offering price of $7.00 per share. The underwriter also exercised its entire over-allotment option of 750,000 shares in accordance with the Underwriting Agreement. The Company received gross proceeds of approximately $40.3 million, before deducting underwriting discounts and commissions and offering expenses payable by the Company. The Offering closed on October 9, 2013. Option and Warrant Exercises Subsequent to September 30, 2013, warrant holders exercised an aggregate of 161,951 warrants at exercise prices between $5.10 and $7.00 per share for gross proceeds of approximately $0.9 million, and option holders exercised an aggregate of 15,000 options at exercise prices between $4.00 and $4.40 per share, for gross proceeds of approximately $0.1 million.