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Share-based Compensation | 6 Months Ended
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Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Share-based Compensation | SHARE-BASED COMPENSATION The Company’s share-based compensation awards are issued under the 2015 Equity Incentive Plan (“2015 Plan”) and two predecessor plans, the 2005 Equity Incentive Plan, and the 2007 Equity Incentive Plan (the “2007 Plan”). Any awards that expire or are forfeited under the 2007 Plan become available for issuance under the 2015 Plan. As of June 30, 2018, 2.2 million shares of common stock remained available for future issuance under all plans, subject to adjustment for future stock splits, stock dividends, and similar changes in capitalization. Refer to Notes 1 and 10 of the Company’s Annual Report on Form 10-K for a detailed description of the Company’s share-based compensation awards, including information related to grant date fair value, vesting terms, performance, and other conditions. Share-Based Compensation Expense Pre-tax share-based compensation expense reported in the Company’s condensed consolidated statements of operations was:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
| (in thousands)
Cost of sales | $ | 98 |  |  | $ | 111 |  |  | $ | 177 |  |  | $ | 200 |
Selling, general and administrative expenses | 3,243 |  |  | 1,225 |  |  | 5,838 |  |  | 3,745 |
Total share-based compensation expense | $ | 3,341 |  |  | $ | 1,336 |  |  | $ | 6,015 |  |  | $ | 3,945 |
Stock Option Activity Stock option activity during the six months ended June 30, 2018 was:
| Number of Options
| (in thousands) |
Outstanding December 31, 2017 | 541 |
Granted | — |
Exercised | (80 | )
Forfeited or expired | (27 | )
Outstanding June 30, 2018 | 434 |
As of June 30, 2018, the Company had $0.3 million of total unrecognized share-based compensation expense related to unvested options, which is expected to be amortized over the remaining weighted average period of 1.89 years. Restricted Stock Awards and Restricted Stock Units Activity The Company grants time-based restricted stock awards (“RSAs”) as well as time-based and performance-based restricted stock units (“RSUs”). RSA and RSU activity during the six months ended June 30, 2018 was:
| Restricted Stock Awards |  | Restricted Stock Units
| Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value
| (in thousands, except fair value data)
Unvested at December 31, 2017 | 17 |  |  | $ | 6.84 |  |  | 3,791 |  |  | $ | 7.99 |
Granted | 35 |  |  | 18.61 |  |  | 1,369 |  |  | 14.18 |
Vested | (39 | ) |  | 13.32 |  |  | (1,041 | ) |  | 8.42 |
Forfeited | — |  |  | — |  |  | (1,180 | ) |  | 7.39 |
Unvested at June 30, 2018 | 13 |  |  | $ | 18.61 |  |  | 2,939 |  |  | $ | 11.09 |
As of June 30, 2018, unrecognized share-based compensation expense for RSAs was $0.2 million, which is expected to amortize over a remaining weighted average period of 0.93 years. RSUs vested during the six months ended June 30, 2018 consisted of 0.8 million time-based awards and 0.2 million performance-based awards. As of June 30, 2018, unrecognized share-based compensation expenses for time-based and performance-based awards were $10.7 million and $9.2 million, respectively, and are expected to amortize over remaining weighted average period of 1.74 years and 2.68 years, respectively.

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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