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Stockholders' Equity Summary of Stock Options Outstanding (Details) | 12 Months Ended
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Dec. 31, 2019 $ / shares shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Options outstanding (shares) | shares | 9,265,390
Weighted-Average Remaining Contractual Life (in Years) | 6 years 5 months 31 days
Weighted average exercise price ($ per share) | $ 5.72
Options exercisable (shares) | shares | 6,745,317
Weighted-average exercise price ($ per share) | $ 6.37
$1.48-$3.00 |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Exercise price, lower range limit ($ per share) | 1.48
Exercise price, upper range limit ($ per share) | $ 3
Options outstanding (shares) | shares | 903,257
Weighted-Average Remaining Contractual Life (in Years) | 3 years 4 months 31 days
Weighted average exercise price ($ per share) | $ 2.29
Options exercisable (shares) | shares | 848,969
Weighted-average exercise price ($ per share) | $ 2.26
$3.01-$6.00 |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Exercise price, lower range limit ($ per share) | 3.01
Exercise price, upper range limit ($ per share) | $ 6
Options outstanding (shares) | shares | 4,066,998
Weighted-Average Remaining Contractual Life (in Years) | 7 years 10 months 30 days
Weighted average exercise price ($ per share) | $ 3.90
Options exercisable (shares) | shares | 1,844,977
Weighted-average exercise price ($ per share) | $ 4.12
$6.01-$9.00 |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Exercise price, lower range limit ($ per share) | 6.01
Exercise price, upper range limit ($ per share) | $ 9
Options outstanding (shares) | shares | 3,454,212
Weighted-Average Remaining Contractual Life (in Years) | 6 years 31 days
Weighted average exercise price ($ per share) | $ 7.20
Options exercisable (shares) | shares | 3,210,448
Weighted-average exercise price ($ per share) | $ 7.24
$9.01-$12.00 |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Exercise price, lower range limit ($ per share) | 9.01
Exercise price, upper range limit ($ per share) | $ 12
Options outstanding (shares) | shares | 220,880
Weighted-Average Remaining Contractual Life (in Years) | 5 years 9 months 30 days
Weighted average exercise price ($ per share) | $ 9.83
Options exercisable (shares) | shares | 220,880
Weighted-average exercise price ($ per share) | $ 9.83
$12.01-$15.00 |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Exercise price, lower range limit ($ per share) | 12.01
Exercise price, upper range limit ($ per share) | $ 15
Options outstanding (shares) | shares | 620,043
Weighted-Average Remaining Contractual Life (in Years) | 4 years 2 months 28 days
Weighted average exercise price ($ per share) | $ 12.96
Options exercisable (shares) | shares | 620,043
Weighted-average exercise price ($ per share) | $ 12.96

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=116856206&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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