Stockholders' equity

12 Months Ended

Dec. 31, 2014

Stockholders' Equity Note [Abstract]

Stockholders' equity

Note 7 - Stockholders' equity

On July 7, 2010, the Company sold 2,737,500 units, with the aggregate units consisting of 2,737,500 shares of the Company’s common stock and warrants to purchase 1,368,750 shares, at a price of $2.00 per unit in a registered direct offering (the “2010 Offering”). The warrants issued as part of the 2010 Offering have an exercise price of $2.60 per share and are exercisable for a five-year period, which commenced on January 7, 2011. The net proceeds pursuant to the 2010 Offering were approximately $4,900,000. The value of the aggregate number of warrants issued pursuant to the 2010 Offering was approximately $1,300,000 and such amount was charged as a component of stockholders’ equity to additional paid-in capital.

Effective as of March 4, 2011, the Company re-purchased warrants to purchase 150,000 shares of the Company’s common stock, at a price of $0.60 per share, which warrants were issued in connection with the 2010 Offering.

On March 7, 2011, the remaining 1,218,750 warrants issued in connection with the 2010 Offering were amended upon consent of the holders of more than two-thirds of the remaining warrants, to among other things, extend the expiration date of the warrants to July 7, 2016.

On June 6, 2014 the Company entered into an Underwriting Agreement with an investment banking firm for itself and as representative for two other investment banking firms (collectively, the “Underwriters”), in connection with an underwritten offering (the “Offering”) of 6,000,000 shares of the Company’s common stock, par value $0.01 per share (the “Firm Shares”). Pursuant to the Underwriting Agreement, the Company agreed to sell to the Underwriters, and the Underwriters agreed to purchase from the Company, an aggregate of 6,000,000 shares of common stock at a price of $2.3375 per share, and the price to the public was $2.50 per share. Pursuant to the Underwriting Agreement, the Company also granted the Underwriters a 30 day option to purchase up to 900,000 additional shares of its common stock to cover over-allotments, if any. The Company also agreed to reimburse certain expenses incurred by the Underwriters in the Offering.

The closing of the Offering was held on June 11, 2014, at which time, the Company sold 6,900,000 shares of its common stock to the Underwriters (including 900,000 shares to cover over-allotments) at a price of $2.3375 per share, and received gross proceeds of $16,128,750. The Underwriters received reimbursement of expenses of $150,000, and the Company also incurred approximately $400,000 of additional expenses in connection with the Offering.