Stockholder Protection Rights Plan	12 Months Ended
Dec. 31, 2019
Stockholder Protection Rights Plan [Abstract]
Stockholder Protection Rights Plan	11. Stockholder Protection Rights Plan On December 13, 2019, the Board of Directors of the Company adopted a stockholder rights plan, and authorized and declared a dividend to stockholders of record at the close of business on December 23, 2019 of one preferred share purchase right (a “Right”) for each outstanding share of common stock, $0.001 par value per share (“Common Stock”), of the Company. Each Right entitles the holder to purchase from the Company one one-thousandth (subject to adjustment) of one share of Series B Junior Participating Preferred Stock, $0.01 par value per share (“Preferred Stock”) of the Company at an exercise price of $5.00 per one one-thousandth of a share of Preferred Stock. The complete terms of the Rights are set forth in a Rights Agreement (the “Rights Agreement”), dated as of December 13, 2019, by and between the Company and American Stock Transfer & Trust Company, LLC, as rights agent. Rights will attach to all common stock certificates representing shares outstanding and no separate Rights certificates will be distributed. Subject to certain exceptions specified in the Rights Agreement, the Rights will separate from the Common Stock and become exercisable following the earlier of (i) the tenth (10th) business day after a public announcement that either discloses that a person or a group of related persons has acquired beneficial ownership of fifteen percent (15%) or more of the Common Stock other than as a result of repurchases of Common Stock by the Company or certain inadvertent acquisitions (an “Acquiring Person”) or information which reveals the existence of an Acquiring Person, or (ii) the tenth (10th) business day or such later date as may be determined by the Board, after a person or a group of related persons announce or commence a tender or exchange offer that would result in a person or a group of related persons becoming an Acquiring Person. For purposes of the Rights Agreement, beneficial ownership is defined to include the ownership of derivative securities. The date on which the Rights separate from the Common Stock and become exercisable is referred to as the “Distribution Date.” The Rights will be redeemable at the Board’s sole discretion for $0.001 per Right (payable in cash, Common Stock or other consideration deemed appropriate by the Board) at any time ending on the earlier of (i) the tenth (10th) business day (or such later date as may be determined by the Board) after the public announcement that a person has acquired beneficial ownership of fifteen percent (15%) or more of the Common Stock and (ii) the final expiration date of the Rights Agreement. Until such time as the Rights are no longer redeemable by the Company, the Rights are not exercisable. Immediately upon the action of the Board ordering redemption, the Rights will terminate and the only right of the holders of the Rights will be to receive the $0.001 redemption price. The redemption price will be adjusted if the Company undertakes a stock dividend, a stock split or similar transaction At any time after the date on which a person beneficially owns fifteen percent (15%) or more of the Common Stock and prior to the acquisition by the person of fifty percent (50%) or more of the Common Stock, the Board may exchange the Rights (other than Rights owned by the Acquiring Person or any Related Person, which would have become void), in whole or in part, for Common Stock at an exchange ratio (subject to adjustment) of one share of Common Stock per Right (or, if insufficient shares are available, the Company may issue preferred stock, cash, debt or equity securities, property or a combination thereof in exchange for the Rights). The Rights will expire at or prior to the earlier of (i) December 13, 2029, or (ii) the redemption or exchange of the Rights as described above. In the event that, at any time after a person or group becomes an “Acquiring Person,” (i) the Company is acquired in a merger or other business combination with another company and the Company is not the surviving corporation, (ii) another company consolidates or merges with the Company and all or part of the Common Stock is converted or exchanged for other securities, cash, or property, or (iii) 50% or more of the consolidated assets or earning power of the Company and its subsidiaries is sold or transferred to another company, then each holder of a Right (except Rights that previously have been voided) shall thereafter have the right to receive, upon exercise, Common Stock or other equity interest of the ultimate parent of such other company having a value equal to two times the exercise price of the Right. The terms of the Rights and the Rights Agreement may be amended by action of the Board in any respect without the consent of the holders of the Rights on or prior to the time a person becomes an Acquiring Person. Thereafter, the terms of the Rights and the Rights Agreement may not be supplemented or amended in any manner that would adversely affect the interests of the holders of the Rights. Until a Right is exercised, the holder thereof, as such, will have no rights as a stockholder of the Company, including, without limitation, the right to vote or to receive dividends. Commensurate with the adoption of the new Series B Junior Participating Preferred Stock, the Series A Junior Participating Preferred Stock was eliminated.

Stockholder Protection Rights Plan

12 Months Ended

Dec. 31, 2019

Stockholder Protection Rights Plan [Abstract]

11. Stockholder Protection Rights Plan

On December 13, 2019, the Board of Directors of the Company adopted a stockholder rights plan, and authorized and declared a dividend to stockholders of record at the close of business on December 23, 2019 of one preferred share purchase right (a “Right”) for each outstanding share of common stock, $0.001 par value per share (“Common Stock”), of the Company. Each Right entitles the holder to purchase from the Company one one-thousandth (subject to adjustment) of one share of Series B Junior Participating Preferred Stock, $0.01 par value per share (“Preferred Stock”) of the Company at an exercise price of $5.00 per one one-thousandth of a share of Preferred Stock. The complete terms of the Rights are set forth in a Rights Agreement (the “Rights Agreement”), dated as of December 13, 2019, by and between the Company and American Stock Transfer & Trust Company, LLC, as rights agent.

Rights will attach to all common stock certificates representing shares outstanding and no separate Rights certificates will be distributed. Subject to certain exceptions specified in the Rights Agreement, the Rights will separate from the Common Stock and become exercisable following the earlier of (i) the tenth (10th) business day after a public announcement that either discloses that a person or a group of related persons has acquired beneficial ownership of fifteen percent (15%) or more of the Common Stock other than as a result of repurchases of Common Stock by the Company or certain inadvertent acquisitions (an “Acquiring Person”) or information which reveals the existence of an Acquiring Person, or (ii) the tenth (10th) business day or such later date as may be determined by the Board, after a person or a group of related persons announce or commence a tender or exchange offer that would result in a person or a group of related persons becoming an Acquiring Person. For purposes of the Rights Agreement, beneficial ownership is defined to include the ownership of derivative securities. The date on which the Rights separate from the Common Stock and become exercisable is referred to as the “Distribution Date.”

The Rights will be redeemable at the Board’s sole discretion for $0.001 per Right (payable in cash, Common Stock or other consideration deemed appropriate by the Board) at any time ending on the earlier of (i) the tenth (10th) business day (or such later date as may be determined by the Board) after the public announcement that a person has acquired beneficial ownership of fifteen percent (15%) or more of the Common Stock and (ii) the final expiration date of the Rights Agreement. Until such time as the Rights are no longer redeemable by the Company, the Rights are not exercisable. Immediately upon the action of the Board ordering redemption, the Rights will terminate and the only right of the holders of the Rights will be to receive the $0.001 redemption price. The redemption price will be adjusted if the Company undertakes a stock dividend, a stock split or similar transaction

At any time after the date on which a person beneficially owns fifteen percent (15%) or more of the Common Stock and prior to the acquisition by the person of fifty percent (50%) or more of the Common Stock, the Board may exchange the Rights (other than Rights owned by the Acquiring Person or any Related Person, which would have become void), in whole or in part, for Common Stock at an exchange ratio (subject to adjustment) of one share of Common Stock per Right (or, if insufficient shares are available, the Company may issue preferred stock, cash, debt or equity securities, property or a combination thereof in exchange for the Rights).

The Rights will expire at or prior to the earlier of (i) December 13, 2029, or (ii) the redemption or exchange of the Rights as described above.

In the event that, at any time after a person or group becomes an “Acquiring Person,” (i) the Company is acquired in a merger or other business combination with another company and the Company is not the surviving corporation, (ii) another company consolidates or merges with the Company and all or part of the Common Stock is converted or exchanged for other securities, cash, or property, or (iii) 50% or more of the consolidated assets or earning power of the Company and its subsidiaries is sold or transferred to another company, then each holder of a Right (except Rights that previously have been voided) shall thereafter have the right to receive, upon exercise, Common Stock or other equity interest of the ultimate parent of such other company having a value equal to two times the exercise price of the Right.

The terms of the Rights and the Rights Agreement may be amended by action of the Board in any respect without the consent of the holders of the Rights on or prior to the time a person becomes an Acquiring Person. Thereafter, the terms of the Rights and the Rights Agreement may not be supplemented or amended in any manner that would adversely affect the interests of the holders of the Rights. Until a Right is exercised, the holder thereof, as such, will have no rights as a stockholder of the Company, including, without limitation, the right to vote or to receive dividends.

Commensurate with the adoption of the new Series B Junior Participating Preferred Stock, the Series A Junior Participating Preferred Stock was eliminated.