N. STOCKHOLDERS' EQUITY	12 Months Ended
Dec. 31, 2017
Equity [Abstract]
STOCKHOLDERS' EQUITY	NOTE N—STOCKHOLDERS’ EQUITY Common Stock The Company’s Amended and Restated Certificate of Incorporation authorizes the issuance of up to 45,000,000 shares of common stock, all of which have been designated voting common stock. Preferred Stock The Company’s Amended and Restated Certificate of Incorporation authorizes the issuance of up to 5,000,000 shares of preferred stock. Warrants As of December 31, 2017 and 2016, the Company had no outstanding warrants to purchase common or preferred stock. Public Offerings of Common Stock On June 3, 2015, the Company filed a Registration Statement on Form S-3 (the “Form S-3”) with the Securities and Exchange Commission effective June 23, 2015, providing for the public offer and sale of certain securities of the Company from time to time, at its discretion, up to an aggregate amount of $140 million. In connection with the Company’s Form S-3, the Company entered into an Equity Distribution Agreement with Raymond James & Associates, Inc. (the “sales agent”) pursuant to which the Company may issue and sell shares of the Company’s stock having an aggregate offering price of up to $40 million (the “ATM Offering”) from time to time through the sales agent. On July 16, 2015, the Company commenced sales of common stock through the ATM Offering. The Company completed its ATM Offering in August 2015 and sold 1.9 million shares at a weighted average price of $21.54 per share, providing proceeds of $38.6 million, net of expenses and underwriting discounts and commissions. On October 17, 2016, the Company filed a Registration Statement on Form S-3 with the Securities and Exchange Commission effective November 1, 2016, providing for the public offer and sale of certain securities of the Company from time to time, at its discretion, up to an aggregate amount of $250 million. In connection with such Form S-3, the Company entered into an Equity Distribution Agreement with Raymond James & Associates, Inc. pursuant to which the Company may issue and sell shares of the Company’s stock having an aggregate offering price of up to $50.0 million (the “Second ATM Offering”) from time to time through Raymond James & Associates, Inc. On November 22, 2016, the Company commenced sales of common stock through the Second ATM Offering. The Company completed its Second ATM Offering in March 2017 and sold 1.6 million shares of common stock at a weighted average price of $31.55 per share, providing proceeds of $48.8 million, net of expenses and underwriting discounts and commissions. Recovery of Stockholder Short Swing Profit In November 2015, a member of the board of directors of the Company paid $6,000 to the Company, representing the disgorgement of short swing profits under Section 16(b) under the Exchange Act. The amount was recorded as additional paid-in capital.

NOTE N—STOCKHOLDERS’ EQUITY

Common Stock

The Company’s Amended and Restated Certificate of Incorporation authorizes the issuance of up to 45,000,000 shares of common stock, all of which have been designated voting common stock.

Preferred Stock

The Company’s Amended and Restated Certificate of Incorporation authorizes the issuance of up to 5,000,000 shares of preferred stock.

Warrants

As of December 31, 2017 and 2016, the Company had no outstanding warrants to purchase common or preferred stock.

Public Offerings of Common Stock

On June 3, 2015, the Company filed a Registration Statement on Form S-3 (the “Form S-3”) with the Securities and Exchange Commission effective June 23, 2015, providing for the public offer and sale of certain securities of the Company from time to time, at its discretion, up to an aggregate amount of $140 million. In connection with the Company’s Form S-3, the Company entered into an Equity Distribution Agreement with Raymond James & Associates, Inc. (the “sales agent”) pursuant to which the Company may issue and sell shares of the Company’s stock having an aggregate offering price of up to $40 million (the “ATM Offering”) from time to time through the sales agent. On July 16, 2015, the Company commenced sales of common stock through the ATM Offering. The Company completed its ATM Offering in August 2015 and sold 1.9 million shares at a weighted average price of $21.54 per share, providing proceeds of $38.6 million, net of expenses and underwriting discounts and commissions.

On October 17, 2016, the Company filed a Registration Statement on Form S-3 with the Securities and Exchange Commission effective November 1, 2016, providing for the public offer and sale of certain securities of the Company from time to time, at its discretion, up to an aggregate amount of $250 million. In connection with such Form S-3, the Company entered into an Equity Distribution Agreement with Raymond James & Associates, Inc. pursuant to which the Company may issue and sell shares of the Company’s stock having an aggregate offering price of up to $50.0 million (the “Second ATM Offering”) from time to time through Raymond James & Associates, Inc. On November 22, 2016, the Company commenced sales of common stock through the Second ATM Offering. The Company completed its Second ATM Offering in March 2017 and sold 1.6 million shares of common stock at a weighted average price of $31.55 per share, providing proceeds of $48.8 million, net of expenses and underwriting discounts and commissions.

Recovery of Stockholder Short Swing Profit

In November 2015, a member of the board of directors of the Company paid $6,000 to the Company, representing the disgorgement of short swing profits under Section 16(b) under the Exchange Act. The amount was recorded as additional paid-in capital.