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Net Loss Per Share - Schedule of Share Totals with a Potentially Dilutive Impact (Details) - $ / shares | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Apr. 14, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Shares with a potentially dilutive impact (in shares) | 9,889,785 | 9,053,129 |
Senior Notes Due 2025 | Convertible Notes Payable |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Conversion price (in dollars per share) | $ 30.60 |  | $ 30.60
Common stock options |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Shares with a potentially dilutive impact (in shares) | 3,344,047 | 6,640,662 |
Restricted stock units |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Shares with a potentially dilutive impact (in shares) | 2,937,690 | 2,145,968 |
Performance-based restricted stock units |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Shares with a potentially dilutive impact (in shares) | 307,859 | 0 |
Shares related to convertible senior notes |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Shares with a potentially dilutive impact (in shares) | 2,768,114 | 0 |
Shares issuable as acquisition-related contingent consideration |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Shares with a potentially dilutive impact (in shares) | 344,436 | 0 |
Employee stock purchase plan |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Shares with a potentially dilutive impact (in shares) | 72,892 | 87,107 |
Restricted shares |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Shares with a potentially dilutive impact (in shares) | 114,747 | 179,392 |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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