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v3.20.2

Stockholders' Equity (Details Textual) - USD ($) |  |  |  |  | 9 Months Ended | 57 Months Ended | 81 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2020 | Jun. 30, 2015 | Dec. 31, 2013 | Nov. 14, 2013 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  | 0 |  |  |
Exercises in period, intrinsic value |  |  |  |  | $ 9,769,000 |  |  |
Compensation cost not yet recognized | $ 0 |  |  |  | $ 0 |  | $ 0 | $ 0
Restricted Stock Units and Stock Options |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Antidilutive securities excluded from computation of Earnings Per Share, amount (in shares) |  |  |  |  | 3,210,930 | 3,162,815 |  |
Convertible Debt |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Antidilutive securities excluded from computation of Earnings Per Share, amount (in shares) |  |  |  |  | 2,700,000 |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting period (in years) | 2 years 4 months 2 days |  |  |  |  |  |  |
Compensation cost not yet recognized | $ 156,759,000 |  |  |  | $ 156,759,000 |  | $ 156,759,000 | $ 156,759,000
The 2005 Stock Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Common stock, capital shares reserved for future issuance (in shares) |  |  | 4,713,319 |  |  |  |  |
Vesting period (in years) |  |  | 4 years |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  |  | 0
Shares available for grant (in shares) | 0 |  |  |  | 0 |  | 0 | 0
The 2013 Omnibus Equity Award Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Common stock, capital shares reserved for future issuance (in shares) |  |  |  | 1,904,633 |  |  |  |
Percentage of outstanding stock reserved for grant |  |  |  | 4.00% |  |  |  |
Percentage of outstanding stock maximum |  |  |  | 5.00% |  |  |  |
Capital shares reserved for future issuance, annual increase, maximum (in shares) | 5,530,555 |  |  |  | 5,530,555 |  | 5,530,555 | 5,530,555
The 2013 Omnibus Equity Award Plan | Employee Stock Option |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting period (in years) |  |  |  | 4 years |  |  |  |
2015 ESPP |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Maximum employee subscription rate |  | 15.00% |  |  |  |  |  |
Purchase price of common stock, percent |  | 85.00% |  |  |  |  |  |
Number of shares authorized (in shares) |  | 500,000 |  |  |  |  |  |
Percent of shares increase, employee stock purchase plan |  | 1.00% |  |  |  |  |  |
Common stock availability threshold, Employee Stock Purchase Plan |  | 2.00% |  |  |  |  |  |
Shares increase threshold, employee stock purchase plan (in shares) |  | 400,000 |  |  |  |  |  |
Number of additional shares authorized (in shares) |  |  |  |  |  |  | 702,163 |
Convertible Debt | 2025 Senior Notes |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Initial conversion price (in dollars per share) | $ 92.12 |  |  |  | $ 92.12 |  | $ 92.12 | $ 92.12

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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=120381028&loc=d3e5070-113901 + Details
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