v2.4.0.6

Stock-Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Stock-Based Compensation |
Allocation of stock-based compensation expense included in the consolidated statements of operations |
|  | Year Ended December 31, |
--- | --- | --- | ---
(in thousands) |  | 2011 |  | 2010 |  | 2009 |
Research and development |  | $ | 13,422 |  | $ | 10,322 |  | $ | 11,542 |
General and administrative |  |  | 11,494 |  |  | 8,687 |  |  | 8,458 |
Total stock-based compensation expense |  | $ | 24,916 |  | $ | 19,009 |  | $ | 20,000
Schedule of stock-based compensation expense by award type included in the consolidated statements of operations |
|  | Year Ended December 31, |
--- | --- | --- | ---
(in thousands) |  | 2011 |  | 2010 |  | 2009 |
Employee stock options |  | $ | 4,528 |  | $ | 7,003 |  | $ | 10,271 |
Employee RSUs |  |  | 13,290 |  |  | 9,783 |  |  | 7,473 |
Employee RSAs |  |  | 5,498 |  |  | 398 |  |  | 470 |
Non-employee options and RSUs |  |  | 307 |  |  | 1,186 |  |  | 501 |
ESPP |  |  | 1,293 |  |  | 639 |  |  | 1,285 |
Total stock-based compensation expense |  | $ | 24,916 |  | $ | 19,009 |  | $ | 20,000
Schedule of unrecognized compensation cost, net of expected forfeitures, and estimated weighted-average amortization period |
(in thousands, except amortization period) |  | Unrecognized Compensation Cost |  | Weighted-average amortization period (years) |
--- | --- | --- | --- | --- | ---
Stock options |  | $ | 7,293 |  |  | 2.8 |
RSUs |  | $ | 12,449 |  |  | 2.0 |
RSAs |  | $ | 5,389 |  |  | 4.5
Summary of equity award activity under the 2008 Plan and the 2004 Plan |
(in thousands, except per share data) |  | Number of Shares Subject to Outstanding Options |  | Weighted- average Exercise Price of Outstanding Options |  | Number of Shares Subject to Outstanding RSUs |  | Weighted- average Fair Value per Share at Grant |  | Number of Shares Outstanding Subject to Vesting or Performance Conditions with vesting |  | Weighted- average Fair Value per Share at Grant |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at December 31, 2008 |  |  | 9,953 |  | $ | 16.01 |  |  | 2,260 |  | $ | 21.51 |  |  | 77 |  | $ | 24.42 |
Granted |  |  | 356 |  |  | 14.90 |  |  | 950 |  |  | 14.66 |  |  | — |  |  | — |
Exercised |  |  | (1,333 | ) |  | 7.77 |  |  | — |  |  | — |  |  | — |  |  | — |
Released RSUs/RSAs |  |  | — |  |  | — |  |  | (603 | ) |  | 14.62 |  |  | (20 | ) |  | 20.18 |
Forfeited |  |  | (562 | ) |  | 25.43 |  |  | (565 | ) |  | 29.78 |  |  | — |  |  | — |
Balance at December 31, 2009 |  |  | 8,414 |  |  | 16.63 |  |  | 2,042 |  |  | 14.15 |  |  | 57 |  |  | 25.87 |
Granted |  |  | 321 |  |  | 14.90 |  |  | 1,170 |  |  | 10.55 |  |  | — |  |  | — |
Exercised |  |  | (784 | ) |  | 9.60 |  |  | — |  |  | — |  |  | — |  |  | — |
Released RSUs/RSAs |  |  | — |  |  | — |  |  | (657 | ) |  | 13.20 |  |  | (24 | ) |  | 25.55 |
Forfeited |  |  | (297 | ) |  | 26.17 |  |  | (658 | ) |  | 26.26 |  |  | — |  |  | — |
Balance at December 31, 2010 |  |  | 7,654 |  |  | 16.91 |  |  | 1,897 |  |  | 12.45 |  |  | 33 |  |  | 26.10 |
Granted |  |  | 629 |  |  | 21.98 |  |  | 471 |  |  | 24.96 |  |  | 2,483 |  |  | 24.42 |
Exercised |  |  | (1,265 | ) |  | 8.87 |  |  | — |  |  | — |  |  | — |  |  | — |
Released RSUs/RSAs |  |  | — |  |  | — |  |  | (797 | ) |  | 13.89 |  |  | (74 | ) |  | 24.96 |
Forfeited |  |  | (127 | ) |  | 29.15 |  |  | (29 | ) |  | 15.35 |  |  | — |  |  | — |
Balance at December 31, 2011 |  |  | 6,891 |  |  | 18.62 |  |  | 1,542 |  |  | 15.47 |  |  | 2,442 |  |  | 24.42 |
Schedule of weighted-average assumptions used to estimate the fair value of stock options granted |
|  | Year Ended December 31,
--- | --- | ---
|  | 2011 |  | 2010 |  | 2009
Employee stock options |  |  |  |  |  |
Risk-free interest rate |  | 1.10% - 2.57% |  | 1.11% - 2.82% |  | 1.55% - 2.98%
Expected life (in years) |  | 5 - 6 |  | 5 - 6 |  | 5 - 6
Volatility |  | 0.49 - 0.55 |  | 0.48 - 0.52 |  | 0.48 - 0.57
Dividend yield |  | —% |  | —% |  | —%
Weighted-average estimated fair value of stock options granted |  | $11.11 |  | $7.41 |  | $7.48
Employee stock purchase plan issuances |  |  |  |  |  |
Risk-free interest rate |  | 0.05% - 0.54% |  | 0.19% - 0.79% |  | 0.17% - 0.88%
Expected life (in years) |  | 0.5 - 2 |  | 0.5 - 2 |  | 0.5 - 2
Volatility |  | 0.48 - 0.59 |  | 0.50 - 0.69 |  | 0.50 - 0.84
Dividend yield |  | —% |  | —% |  | —%
Weighted-average estimated fair value of ESPP issuances |  | $9.46 |  | $7.63 |  | $6.42
Schedule of outstanding options to purchase common stock based on range of stock option exercise prices |
|  | Options Outstanding |  | Options Exercisable |
--- | --- | --- | --- | --- | ---
Range of Exercise Prices |  | Number Outstanding |  | Weighted- average Remaining Contractual Life in Years |  | Weighted- average Exercise Prices |  | Options Exercisable |  | Weighted- average Remaining Contractual Life in Years |  | Weighted- average Exercise Price |
$3.10 |  |  | 557 |  |  | 1.3 |  | $ | 3.10 |  |  | 557 |  |  | 1.3 |  | $ | 3.10 |
$6.15 - $6.70 |  |  | 145 |  |  | 6.9 |  |  | 6.19 |  |  | 99 |  |  | 6.9 |  |  | 6.18 |
$8.53 |  |  | 218 |  |  | 0.4 |  |  | 8.53 |  |  | 218 |  |  | 0.4 |  |  | 8.53 |
$9.69 |  |  | 1,172 |  |  | 2.3 |  |  | 9.69 |  |  | 1,172 |  |  | 2.3 |  |  | 9.69 |
$9.70 - $16.00 |  |  | 924 |  |  | 5.1 |  |  | 14.69 |  |  | 749 |  |  | 4.5 |  |  | 15.00 |
$16.01 - $21.96 |  |  | 1,493 |  |  | 5.6 |  |  | 18.52 |  |  | 1,061 |  |  | 4.1 |  |  | 18.34 |
$21.97 - $29.70 |  |  | 1,385 |  |  | 5.5 |  |  | 27.34 |  |  | 1,136 |  |  | 4.7 |  |  | 28.00 |
$29.71 - $35.46 |  |  | 997 |  |  | 5.2 |  |  | 33.52 |  |  | 997 |  |  | 5.2 |  |  | 33.52 |
Total |  |  | 6,891 |  |  | 4.4 |  |  | 18.62 |  |  | 5,989 |  |  | 3.7 |  |  | 18.61 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options and employee stock purchase plan issuances, including, but not limited to: (a) expected term of share options and other similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References No definition available. + Details
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- Definition Tabular disclosure of information pertaining to unrecognized compensation cost, net of expected forfeitures, and the estimated weighted-average amortization period, using the straight-line attribution method. + References No definition available. + Details
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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 -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (h)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: 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 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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