Filed Pursuant to Rule 424(b)(5)
Registration No. 333-254261
PROSPECTUS SUPPLEMENT
(to Prospectus dated May 5, 2021)
$60,000,000
Common Stock
We have entered into an At-The-Market Offering Agreement, or the ATM Agreement, with
Craig-Hallum Capital Group LLC, or Craig-Hallum, relating to the sale of up to $60,000,000 of shares of our common stock, $0.01 par value per share, aggregate offering price of up to $60,000,000 from time to time through Craig-Hallum, as our
agent.
Our common stock is traded on the Nasdaq Capital Market under the symbol “CEMI”. On
July 16, 2021, the closing price of our common stock on the Nasdaq Capital Market was $2.41 per share. During the 18 months prior to the date of this prospectus supplement, our common stock has traded at a low of $2.25 and a high of $15.89. From
the beginning of 2021 through July 16, 2021, our common stock has traded at a low of $2.38 and a high of $8.75.
Sales of common stock, if any, under this prospectus supplement and the accompanying
prospectus may be made in sales deemed to be “at the market” equity offerings as defined in Rule 415 under the Securities Act of 1933, including: sales made directly on or through the Nasdaq Capital Market, the existing trading market for our
common stock; sales made to or through a market maker other than on an exchange or otherwise, in negotiated transactions at market prices prevailing at the time of sale or at prices related to such prevailing market prices; and/or any other
method permitted by law. Craig-Hallum is not required to sell a certain number of shares or dollar amount of common stock. Craig-Hallum will use commercially reasonable efforts to sell on our behalf all of the shares of common stock requested to
be sold by us, consistent with their normal trading and sales practices, on mutually agreed terms between Craig-Hallum and us. There is no arrangement for funds to be received in any escrow, trust or similar arrangement.
Craig-Hallum will be entitled to a commission equal to 3.5% of the gross sales price
per share sold under the ATM Agreement. In connection with its sale of common stock on our behalf, Craig-Hallum may be deemed to be an “underwriter” within the meaning of the Securities Act of 1933 and the compensation of Craig-Hallum may be
deemed to be underwriting commissions or discounts.
Investing in our common stock involves a high degree of risk. See
“Risk Factors” beginning on page S-5 of this prospectus supplement for a discussion of important factors you should carefully consider before making an investment decision.
Neither the Securities and Exchange Commission nor any state
securities commission has approved or disapproved of these securities, or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.
Craig-Hallum
The date of this prospectus supplement is July 19, 2021.