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Equity Exercise Price Ranges (Details) | 12 Months Ended
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Dec. 31, 2015 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Number of outstanding options (in shares) | shares | 14,019,629
Outstanding options, weighted average remaining contractual term | 6 years 6 months
Outstanding options, weighted average exercise price (in dollars per share) | $ 3.62
Number of exercisable options (in shares) | shares | 10,951,694
Exercisable options, weighted average exercise price (in dollars per share) | $ 2.80
$0.50 - $0.76 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, lower range limit (in dollars per share) | 0.50
Exercise price range, upper range limit (in dollars per share) | $ 0.76
Number of outstanding options (in shares) | shares | 441,429
Outstanding options, weighted average remaining contractual term | 3 years 4 months 24 days
Outstanding options, weighted average exercise price (in dollars per share) | $ 0.72
Number of exercisable options (in shares) | shares | 441,429
Exercisable options, weighted average exercise price (in dollars per share) | $ 0.72
$0.87 - $1.35 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, lower range limit (in dollars per share) | 0.87
Exercise price range, upper range limit (in dollars per share) | $ 1.35
Number of outstanding options (in shares) | shares | 4,783,304
Outstanding options, weighted average remaining contractual term | 5 years 8 months 12 days
Outstanding options, weighted average exercise price (in dollars per share) | $ 1.19
Number of exercisable options (in shares) | shares | 4,783,304
Exercisable options, weighted average exercise price (in dollars per share) | $ 1.19
$1.40 - $2.45 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, lower range limit (in dollars per share) | 1.40
Exercise price range, upper range limit (in dollars per share) | $ 2.45
Number of outstanding options (in shares) | shares | 1,641,928
Outstanding options, weighted average remaining contractual term | 5 years 1 month 6 days
Outstanding options, weighted average exercise price (in dollars per share) | $ 1.93
Number of exercisable options (in shares) | shares | 1,641,928
Exercisable options, weighted average exercise price (in dollars per share) | $ 1.93
$2.66 - $3.99 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, lower range limit (in dollars per share) | 2.66
Exercise price range, upper range limit (in dollars per share) | $ 3.99
Number of outstanding options (in shares) | shares | 957,454
Outstanding options, weighted average remaining contractual term | 6 years 9 months 18 days
Outstanding options, weighted average exercise price (in dollars per share) | $ 3.05
Number of exercisable options (in shares) | shares | 907,452
Exercisable options, weighted average exercise price (in dollars per share) | $ 3.00
$4.19 - $6.38 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, lower range limit (in dollars per share) | 4.19
Exercise price range, upper range limit (in dollars per share) | $ 6.38
Number of outstanding options (in shares) | shares | 3,552,323
Outstanding options, weighted average remaining contractual term | 7 years 4 months 24 days
Outstanding options, weighted average exercise price (in dollars per share) | $ 5.35
Number of exercisable options (in shares) | shares | 2,229,386
Exercisable options, weighted average exercise price (in dollars per share) | $ 5.32
$6.45- $9.78 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, lower range limit (in dollars per share) | 6.45
Exercise price range, upper range limit (in dollars per share) | $ 9.78
Number of outstanding options (in shares) | shares | 2,527,525
Outstanding options, weighted average remaining contractual term | 8 years 1 month 6 days
Outstanding options, weighted average exercise price (in dollars per share) | $ 7.29
Number of exercisable options (in shares) | shares | 914,703
Exercisable options, weighted average exercise price (in dollars per share) | $ 7.18
$9.90 - $10.99 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Exercise price range, lower range limit (in dollars per share) | 9.90
Exercise price range, upper range limit (in dollars per share) | $ 10.99
Number of outstanding options (in shares) | shares | 115,666
Outstanding options, weighted average remaining contractual term | 8 years 10 months 24 days
Outstanding options, weighted average exercise price (in dollars per share) | $ 10.43
Number of exercisable options (in shares) | shares | 33,492
Exercisable options, weighted average exercise price (in dollars per share) | $ 10.50

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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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