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Stock-Based Compensation Plans | 3 Months Ended
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Mar. 31, 2019
Share-based Compensation [Abstract] |
Stock-Based Compensation Plans | Stock-Based Compensation Plans The components of stock-based compensation expense for the three months ended March 31, 2019 and 2018 were as follows:
| Three months ended March 31,
| 2019 |  | 2018
| (in thousands)
2007 Stock Incentive Plan | $ | 1,259 |  |  | $ | 905 |
Employee Stock Purchase Plan | 6 |  |  | 20 |
Total Stock Compensation Expense | $ | 1,265 |  |  | $ | 925 |
The 2007 Stock Incentive Plan (the “2007 Plan”) was adopted on May 24, 2007. Under this 2007 Plan, a total of 2,800,000 shares are authorized for stock based compensation available in the form of either restricted stock awards (“RSA’s”) or stock options. The RSA’s are subject to service-based vesting, typically between one and three years, where a specific period of continued employment must pass before an award vests. The expense associated with these awards is recognized on a straight-line basis over the respective vesting period, with forfeitures accounted for as they occur. For any vesting tranche of an award, the cumulative amount of compensation cost recognized is equal to the portion of the grant‑date fair value of the award tranche that is actually vested at that date. There are no stock options outstanding under the 2007 Plan. The 2018 Stock Incentive Plan (the “2018 Plan”) was adopted on May 24, 2018. Under this 2018 Plan, a total of 800,000 shares are authorized for stock based compensation, plus the number of shares remaining under the 2007 Plan and any future forfeited awards under the 2007 Plan, in the form of RSA’s. The RSA’s are subject to service-based vesting, typically between one and three years, where a specific period of continued employment or service must pass before an award vests. The expense associated with these awards is recognized on a straight-line basis over the respective vesting period, with forfeitures accounted for as they occur. For any vesting tranche of an award, the cumulative amount of compensation cost recognized is equal to the portion of the grant‑date fair value of the award tranche that is actually vested at that date. As of March 31, 2019, the Company has 890,730 shares available for future issuance. The fair value of the restricted stock awards equaled the stock price at the grant date. As of March 31, 2019, the Company has not granted RSA’s under the 2018 Plan. The following table summarizes restricted stock activity during the three months ended March 31, 2019:
| Shares
Restricted stock at December 31, 2018 | 417,890 |
Shares granted | — |
Shares forfeited | — |
Shares vested | (91,229 | )
Restricted stock at March 31, 2019 | 326,661 |
Under the Employee Stock Purchase Plan (“ESPP”), as amended and restated effective April 1, 2018, 325,000 shares of common stock have been reserved for issuance. Eligible employees may designate not more than 10% of their cash compensation to be deducted each pay period for the purchase of common stock under the Purchase Plan. Participants may purchase not more than 1,000 shares or $25,000 of common stock in any one calendar year. Each January 31 and July 31 shares of common stock are purchased with the employees’ payroll deductions from the immediately preceding six months at a price per share of 85% of the lesser of the market price of the common stock on the purchase date or the market price of the common stock on the date of entry into an offering period. In the three months ended March 31, 2019 and 2018, 6,732 and 5,497 shares of common stock, respectively, were issued under the ESPP. The Company issues new shares through its transfer agent upon employee stock purchase.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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