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STOCKHOLDERS' EQUITY | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
STOCKHOLDERS' EQUITY | 13. STOCKHOLDERS’ EQUITY Common Stock Offering On February 2, 2021, the Company closed on their secondary public offering and sale (the “Offering”) of their common stock in which the Company issued and sold 5,566,000 shares of our common stock, which included shares pursuant to an option granted to underwriters to purchase additional shares, at a public offering price of $15.50 per share. The Company received net proceeds of $80.6 million after deducting underwriting discounts, commissions and offering expenses. Common Stock The Company’s amended and restated certificate of incorporation as of December 31, 2020 authorized the issuance of 200.0 million shares of common stock, $0.01 par value per share, of which 29.1 million were issued and outstanding as of December 31, 2023. The following table summarizes the total number of shares of the Company’s common stock issued and reserved for issuance as of December 31, 2023 and 2022 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2023 |  | December 31, 2022 | ​
Shares of common stock issued |  | 29,092 |  | 27,268 | ​
Shares of common stock reserved for issuance for: |  |  |  |  | ​
Common stock warrants outstanding |  | 41 |  | 61 | ​
Stock options outstanding |  | 1,270 |  | 1,301 | ​
Restricted stock units outstanding |  | 3,360 |  | 3,901 | ​
Shares available for grant under stock incentive plans |  | 978 |  | 1,140 | ​
Shares available for sale under employee stock purchase plan |  | 1,335 |  | 1,063 | ​
Total shares of common stock issued and reserved for issuance |  | 36,076 |  | 34,734 | ​
​ Each share of common stock entitles the holder to one vote on all matters submitted to a vote of the Company’s stockholders. Holders of common stock are entitled to receive any dividends that the Company’s board of directors may declare out of funds legally available for that purpose on a non-cumulative basis. The Company has never paid, and for the foreseeable future does not expect to pay, a dividend on its common stock. Common Stock Warrants The following table summarizes the Company’s outstanding common stock warrants as of December 31, 2023 and 2022 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​
December 31, 2023 |  |  | ​ |  |
Warrants |  |  | ​ |  |
Outstanding | ​ | ​ | ​ | ​ | ​
(in thousands) | ​ | Exercise Price | ​ | Expiration Date
20 | ​ | $ | 9.73 |  | Mar-2024
21 | ​ | $ | 9.73 |  | Dec-2024
41 | ​ |  |  |  |
​ ​ ​ ​ ​ ​ ​
​ | ​ | ​ | ​ | ​ | ​
December 31, 2022 |  |  | ​ |  |
Warrants |  |  | ​ |  |
Outstanding | ​ | ​ | ​ | ​ | ​
(in thousands) | ​ | Exercise Price | ​ | Expiration Date
20 | ​ | $ | 9.73 |  | Aug-2023
20 | ​ | $ | 9.73 |  | Mar-2024
21 | ​ | $ | 9.73 |  | Dec-2024
61 | ​ |  |  |  |
​

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