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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2016
Stockholders' Equity |
Schedule of key assumptions to determine fair value of options |
|  | Three Months Ended |  |
|  | March 31, |  |
|  | 2016 |  | 2015 |  |
Average volatility |  | 30.2 | % | 27.5 | % |
Risk-free interest rate |  | 1.6 | % | 1.3 | % |
Weighted-average expected life in years |  | 5.7 |  | 4.7 |  |
Dividend yield rate |  | — | % | — | % |
Schedule of the summary of option activity under all plans |
|  |  |  |  |  |  | Weighted-Average |  |  |  |
|  |  |  | Weighted-Average |  | Remaining |  | Aggregate |
|  |  |  | Exercise |  | Contractual |  | Intrinsic |
|  | Options |  | Price |  | Term (Years) |  | Value(1) |
|  |  |  |  |  |  |  |  | (in thousands) |
Outstanding as of December 31, 2015 |  | 12,240,467 |  | $ | 15.41 |  |  |  |  |  |
Options granted |  | 2,225,900 |  |  | 11.85 |  |  |  |  |  |
Options exercised |  | (9,200) |  |  | 11.31 |  |  |  |  |  |
Options cancelled |  | (15,235) |  |  | 14.03 |  |  |  |  |  |
Options expired |  | (105,693) |  |  | 24.12 |  |  |  |  |  |
Outstanding as of March 31, 2016 |  | 14,336,239 |  | $ | 14.80 |  | 4.89 |  | $ | 3,670 |
Exercisable as of March 31, 2016 |  | 7,896,359 |  | $ | 16.10 |  | 3.44 |  | $ | 2,024 |
The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the estimated fair value of the Company’s common stock for those awards that have an exercise price below the estimated fair value at March 31, 2016.
Schedule of information relating to options grants |
|  | Three Months Ended |
|  | March 31, |
|  | 2016 |  | 2015 |
|  | (in thousands, except per share data) |
Weighted-average grant date fair value |  | $ | 3.37 |  | $ | 3.53 |
Intrinsic value of options exercised |  |  | 15 |  |  | 189 |
Cash received |  |  | 104 |  |  | 910 |
Total fair value of the options vested during the year |  |  | 3,259 |  |  | 1,423 |
Schedule of the summary of nonvested options status |
|  |  |  | Weighted-Average |
|  |  |  | Grant Date |
|  | Options |  | Fair Value |
Nonvested as of December 31, 2015 |  | 5,202,095 |  | $ | 3.44 |
Options granted |  | 2,225,900 |  |  | 3.37 |
Options vested |  | (972,880) |  |  | 3.35 |
Options forfeited |  | (15,235) |  |  | 4.89 |
Nonvested as of March 31, 2016 |  | 6,439,880 |  |  | 3.42 |
Schedule of information relating to RSU grants and deliveries |
|  |  |  | Total Fair Market |
|  |  |  | Value of RSUs |
|  |  |  | Issued |
|  | Total RSUs |  | as |
|  | Issued |  | Compensation(1) |
|  |  |  | (in thousands) |
RSUs outstanding at December 31, 2015 |  | 866,540 |  |  |  |
RSUs granted |  | 661,228 |  | $ | 7,492 |
RSUs forfeited |  | (2,151) |  |  |  |
Common stock delivered |  | (133,010) |  |  |  |
RSUs surrendered for taxes |  | (90,550) |  |  |  |
RSUs outstanding at March 31, 2016 |  | 1,302,057 |  |  |  |
The total fair market value is derived from the number of RSUs granted times the current stock price on the date of grant.
Schedule of recorded share-based compensation expense under all plans |
|  | Three Months Ended |
|  | March 31, |
|  | 2016 |  | 2015 |
|  | (in thousands) |
Cost of revenues |  | $ | 799 |  | $ | 488 |
Operating expenses: |  |  |  |  |  |  |
Selling, distribution and marketing |  |  | 66 |  |  | 40 |
General and administrative |  |  | 2,646 |  |  | 1,490 |
Research and development |  |  | 340 |  |  | 212 |
Total share-based compensation |  | $ | 3,851 |  | $ | 2,230 |
Schedule of changes in stockholders' equity |
|  | Three Months |
|  | Ended |
|  | March 31, |
|  | 2016 |
|  | (in thousands) |
Stockholders’ equity as of December 31, 2015 |  | $ | 295,510 |
Net income |  |  | 2,489 |
Accumulated other comprehensive income |  |  | 436 |
Exercise of stock options |  |  | 104 |
Nonemployee share-based compensation expense |  |  | 453 |
Employee share-based compensation expense |  |  | 3,398 |
Repurchase of common stock(1) |  |  | (1,083) |
Purchase of treasury stock |  |  | (4,722) |
Stockholders’ equity as of March 31, 2016 |  | $ | 296,585 |
| (1) |  | Repurchase of common stock relating to the tax withholding of equity award settlements.

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