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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2015
Stock-Based Compensation [Abstract] |
Compensation costs related to stock-based awards | The following table summarizes compensation costs related to our stock-based awards (in thousands, except per share data):
|  | ThreeMonthsEnded March31, |
|  | 2015 |  |  | 2014 |
Cost of revenue |  | $ | 5 |  |  | $ | 5 |
Selling, general and administrative |  |  | 225 |  |  |  | 244 |
Research and development |  |  | 44 |  |  |  | 43 |
Total stock-based compensation |  |  | 274 |  |  |  | 292 |
Tax effect on stock-based compensation |  |  | — |  |  |  | — |
Net effect on net income (loss) |  | $ | 274 |  |  | $ | 292 |
Summary of stock option activity | The following table summarizes our stock option activities during the three months ended March 31, 2015 (in thousands, except per share data):
Stock Options |  | Shares |  |  | Weighted- average Exercise Price |  |  | Weighted- average Remaining Contractual Life (inyears) |  |  | Aggregate Intrinsic Value |
Balance as of January 1, 2015 |  |  | 3,198 |  |  | $ | 3.12 |  |  |  | 6.95 |  |  | $ | 1,247 |
Granted |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Exercised |  |  | (54 | ) |  |  | 1.40 |  |  |  |  |  |  |  |  |
Canceled and expired |  |  | (29 | ) |  |  | 2.74 |  |  |  |  |  |  |  |  |
Balance as of March 31, 2015 |  |  | 3,115 |  |  | $ | 3.16 |  |  |  | 6.72 |  |  | $ | 966 |
Options vested and expected to vest as of March 31, 2015 |  |  | 3,115 |  |  | $ | 3.16 |  |  |  | 6.72 |  |  | $ | 966 |
Options exercisable as of March 31, 2015 |  |  | 1,885 |  |  | $ | 3.51 |  |  |  | 5.35 |  |  | $ | 667 |
Restricted stock awards | A summary of activity related to restricted stock awards for the three months ended March 31, 2015 is presented below (in thousands, except per share data):
Stock Awards |  | Shares |  |  | Weighted-Average GrantDateFairValue |
Non-vested as of January 1, 2015 |  |  | 261 |  |  | $ | 2.71 |
Granted |  |  | — |  |  | $ | — |
Vested |  |  | — |  |  | $ | — |
Non-vested as of March 31, 2015 |  |  | 261 |  |  | $ | 2.71 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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