Prospectus excerpt:  We are distributing at no charge to holders of our common stock as of December 20, 2021 (the “Record Date”) transferable rights to purchase up to an aggregate of 2,542,593 shares of 2.75% convertible preferred stock, Series C, par value $0.001 per share (“Convertible Preferred Stock”).  The shares of Convertible Preferred Stock will be convertible into shares of our common stock at a conversion rate equivalent to a conversion price of $20.50 per share of common stock (which is a ratio of 1.2195 shares of common stock for each share of Convertible Preferred Stock held), subject to adjustment upon the occurrence of certain events.  We expect the total purchase price of Convertible Preferred Stock in this rights offering to be $63,564,825 assuming full participation.