In the Company’s stockholders approved the Equity Incentive Plan, which was subsequently amended and restated in (as amended, the Equity Plan”). The Equity Plan provides directors, executive officers, and other employees of the Company with additional incentives by allowing them to acquire ownership interest in the business and, as a result, encouraging them to contribute to the Company’s success. The Company provide these incentives through the grant of stock options, stock appreciation rights, restricted stock, restricted stock units, performance shares and units, and other cash-based or stock-based awards. As of shares of common stock are authorized and reserved for issuance under the Equity Plan. This reserve automatically increases on each   from through by an amount equal to the smaller of (i)  of the number of shares issued and outstanding on the immediately preceding   or (ii) an amount determined by the Company’s Board of Directors. The restricted shares of common stock granted generally provide for service-based vesting after to years following the grant date. A summary of the changes in unvested shares of the restricted stock during the year ended is presented below.