may offer general debt obligations, which may be secured or unsecured, senior or subordinated and convertible into common stock.
In this prospectus, we refer to debt securities having any or all of these features as the “debt securities.” We may
issue debt securities under a note purchase agreement or under an indenture to be entered between us and a trustee. A form of
the indenture is included as an exhibit to the registration statement of which this prospectus forms a part. The indenture does
not limit the amount of securities that may be issued under it and provides that debt securities may be issued in one or more
series. Senior debt securities will have the same rank as other indebtedness that is not subordinated. Subordinated debt securities
will be subordinated to any senior debt on terms set forth in the applicable prospectus supplement. In addition, subordinated
debt securities will be effectively subordinated to creditors and preferred shareholders of our subsidiaries. Our board of directors
will determine the terms of each series of debt securities we may offer.
addition to the form of indenture, supplemental indentures and forms of debt securities containing the terms of debt securities
we may offer under this prospectus will be filed as exhibits to the registration statement of which this prospectus forms a part,
or will be incorporated by reference from another report that we file with the SEC.
may offer warrants for the purchase of common stock, preferred stock or debt securities. We may issue the warrants by themselves
or together with shares or common stock or preferred stock or with debt securities, and the warrants may be attached to or separate
from any offered securities. Our board of directors will determine the terms of the warrants, including the class and number
of underlying shares, the purchase price and any other rights and privileges, which will be set forth in the form of warrant
or the warrant agreement and warrant certificate.
may offer units comprised of any combination of our common stock, preferred stock, debt securities or warrants to purchase any
of these securities, in one or more series. We may evidence each series of units by unit certificates that we will issue under
a separate agreement. We may enter into unit agreements with a unit agent, which will be a bank or trust company that we select.
We will indicate the name and address of any unit agent in the applicable prospectus supplement relating to a particular series
in our securities involves a high degree of risk and uncertainty. Before making an investment decision with respect to our securities,
we urge you to carefully consider the risks described in the “Risk Factors” section of our Annual Report on
Form 10-K for the year ended December 31, 2016 and our Quarterly Reports on Form 10-Q for the quarterly period ended March 31,
2017 and June 30, 2017, which are incorporated by reference into this prospectus. We expect to update these risk factors from
time to time in the periodic and current reports that we file with the SEC after the date of this prospectus, which will be incorporated
by reference into this prospectus. Please also carefully consider the other information included in or incorporated by reference
into this prospectus, as may be updated by our subsequent filings under the Securities Exchange Act of 1934, as amended, or the
Exchange Act. In connection with any specific offering, we also expect to provide risk factors and other information in the applicable
prospectus supplement or in any related free writing prospectus. If one or more of the adverse events relevant to these risks
and uncertainties actually occurs, our business, financial condition, and results of operations could be severely harmed. This
could cause the trading price of our securities to decline, and you could lose all or part of your investment. Additional risks
and uncertainties not presently known to us or that we currently deem immaterial also may have similar adverse effects on us.