effective by the SEC. The Existing Registration Statement expired on July 8, 2024, however, pursuant to Rule 415 of the Securities Act, the Company is permitted to continue making offers and sales of securities covered by the Existing Registration Statement and prospectus supplements thereto until the earlier of the effective date of the Registration Statement or 180 days after July 8, 2024.
December 2020 Purchase Agreement with Lincoln Park Capital, LLC
On December 4, 2020, the Company entered into the 2020 Lincoln Park PA with Lincoln Park to place up to $100.0 million or 16.0 million shares in the aggregate of the Company’s common stock on an ongoing basis when required by the Company over a term of 36 months. The 2020 Lincoln Park PA expired by its terms in December 2023 and therefore, no shares were sold during the three and six months ended June 30, 2024. During the three and six months ended June 30, 2023, the Company sold 0.9 million shares of common stock for net proceeds of $0.8 million pursuant to the 2020 Lincoln Park PA.
7. STOCK-BASED COMPENSATION
Stock-based compensation awards consist of stock options, restricted stock units and bonus shares issued under the Company’s equity incentive plans, which include the 2013 Plan and the Inducement Plan.
The Company’s stockholders approved amendments to the 2013 Plan to increase the authorized number of shares of common stock available and reserved for issuance under the 2013 Plan by 1,500,000 shares on May 10, 2023, and an additional 3,000,000 shares on May 30, 2024.
Under the 2013 Plan, the Company may grant awards of stock options, stock appreciation rights, restricted stock awards, restricted stock units (“RSUs”), unrestricted stock, dividend equivalent rights, performance shares and other performance-based awards, other equity-based awards and cash bonus awards to eligible persons. Equity awards under the 2013 Plan are granted from time to time at the discretion of the Compensation Committee of the Board (the “Committee”), with vesting periods and other terms as determined by the Committee with a maximum term of 10 years. The 2013 Plan is administered by the Committee, which can delegate the administration to the Board, other committees or to such other officers and employees of the Company as designated by the Committee and permitted by the 2013 Plan. As of June 30, 2024, 100,003 shares were available for future issuances under the 2013 Plan.
The Inducement Plan provides for the grant of equity-based awards, including restricted stock units, restricted stock, performance shares and performance units. Under the Inducement Plan, the Company may grant equity awards for the sole purpose of recruiting and hiring new employees. As of June 30, 2024, 114,429 shares were available for future issuances under the Inducement Plan.
The Company has elected to account for forfeitures as they occur rather than estimating forfeitures. Expense associated with an award that is forfeited prior to vesting will be reversed accordingly. For the three and six months ended June 30, 2024, the Company recorded stock-based compensation expense of $0.3 million and $0.5 million, respectively. For the three and six months ended June 30, 2023, the Company recorded stock-based compensation expense of $0.3 million and $0.1 million, respectively. Stock compensation expense is recorded in general and administrative expenses.