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Equity Incentive Plan Details 1 (Details) - $ / shares | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award |  |
Options, Outstanding, Number | 847,830 | 1,008,476
Options, Outstanding, Weighted Average Exercise Price | $ 260.88 | $ 232.99
Options, Outstanding, Weighted Average Remaining Contractual Term | 4 years 10 months 24 days |
Options, Exercisable, Number | 676,202 |
$0.0-$110.0 Range of Exercise Price |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Options, Outstanding, Number | 74,868 |
Options, Outstanding, Weighted Average Exercise Price | $ 90.76 |
Options, Outstanding, Weighted Average Remaining Contractual Term | 9 months 18 days |
Options, Exercisable, Number | 74,868 |
$110.0-$135.0 Range of Exercise Price |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Options, Outstanding, Number | 86,140 |
Options, Outstanding, Weighted Average Exercise Price | $ 133.00 |
Options, Outstanding, Weighted Average Remaining Contractual Term | 1 year 9 months 18 days |
Options, Exercisable, Number | 86,140 |
$135.0-$170.0 Range of Exercise Price |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Options, Outstanding, Number | 214,451 |
Options, Outstanding, Weighted Average Exercise Price | $ 159.78 |
Options, Outstanding, Weighted Average Remaining Contractual Term | 3 years 3 months 18 days |
Options, Exercisable, Number | 214,451 |
$170.0-$250.0 Range of Exercise Price |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Options, Outstanding, Number | 113,906 |
Options, Outstanding, Weighted Average Exercise Price | $ 244.99 |
Options, Outstanding, Weighted Average Remaining Contractual Term | 4 years 10 months 24 days |
Options, Exercisable, Number | 113,906 |
$250.0 and Greater Range of Exercise Price |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Options, Outstanding, Number | 358,465 |
Options, Outstanding, Weighted Average Exercise Price | $ 392.68 |
Options, Outstanding, Weighted Average Remaining Contractual Term | 7 years 4 months 24 days |
Options, Exercisable, Number | 186,837 |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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