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Stockholders' Equity and Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2021 | Mar. 31, 2020 | Nov. 14, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Intrinsic value of options exercised |  | $ 15,000 | $ 6,000 |
Proceeds from the exercise of options |  | $ 574 | $ 558 |
Issuance of common stock under the Employee Stock Purchase Plan (in shares) |  | 0 |  |
Unrecognized expense | $ 58,300 | $ 58,300 |  |
Common stock repurchase plan, authorized |  |  |  | $ 10,000
Number of shares repurchased (in shares) |  | 0 |  |
Restricted stock units and awards |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vested, fair value |  | $ 100 |  |
Performance Restricted Stock Awards and Performance Restricted Stock Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards outstanding (in shares) | 700 | 700 |  |
Performance-based awards, performance goals not yet established (in shares) | 300 | 300 |  |
Follow-on public offering |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued (in shares) | 2,500 |  |  |
Sale of stock, price per share (in dollars per share) | $ 34.00 | $ 34.00 |  |
Net proceeds received | $ 82,400 |  |  |
Underwriters option to purchase |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued (in shares) | 300 |  |  |

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