Stockholders' Equity

6 Months Ended

Jun. 29, 2014

Stockholders' Equity Attributable to Parent [Abstract]

Stockholders' Equity

Stockholders' Equity

Common and Preferred Stock

The Company is authorized to issue 100 million shares of common stock and has 10 million shares of authorized but unissued shares of preferred stock. Without any further vote or action by the Company's stockholders, the Board of Directors has the authority to determine the powers, preferences, rights, qualifications, limitations or restrictions granted to or imposed upon any wholly unissued shares of undesignated preferred stock.

Issuance of Common Stock and Warrants

On July 31, 2013, the Company filed a shelf registration statement on Form S-3 under which the Company may, from time to time, sell securities in one or more offerings up to a total dollar amount of $40.0 million. The Company's shelf registration statement was declared effective on August 30, 2013 and expires in August 2016.

In November 2013, the Company issued an aggregate of 8,740,000 shares of common stock, $0.001 par value, in an underwritten public offering at a price of $2.90 per share. The Company received net proceeds from the offering of approximately $23.1 million, net of underwriter's commission and other offering expenses of $2.2 million.

In June 2012, the Company issued an aggregate of 5,122,000 shares of common stock and warrants to purchase up to an aggregate of 2,304,900 shares of common stock in a confidentially marketed underwritten offering. The common stock and warrants were issued in units (the “Units”), with each Unit consisting of (i) one share of common stock and (ii) a warrant to purchase 0.45 of a share of common stock, at a price of $2.50 per Unit. The Company received total net proceeds from the offering of $11.9 million, net of underwriting discounts and other offering expenses of $929,000

The warrants are exercisable any time for a period of 60 months from the date of issuance on June 6, 2012, and are exercisable at a price of $2.98 per share. The Company allocated the proceeds between the common stock and the warrants based on the relative fair value of each on the date of issuance. The estimated grant date fair value was $0.97 per warrant and was calculated based on the following assumptions used in the Black-Scholes model: expected term of 5 years, risk-free interest rate of 0.89%, expected volatility of 62.18% and expected dividend of zero.