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Equity Incentive Plan - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2019 | Jun. 30, 2017 | Jun. 30, 2016 | May 31, 2015 | May 31, 2014 | Jun. 30, 2011 | May 31, 2010 | May 31, 2009 | Dec. 31, 2007 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 1997
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangements by share-based payment award, options, exercises in period, weighted average exercise price |  |  |  |  |  |  |  |  |  |  | $ 15.29 |  |  |
Common stock, shares, issued, total |  |  |  |  |  |  |  |  |  |  | 102,005,000 | 91,310,000 |  |
Common stock, capital shares reserved for future issuance |  |  |  |  |  |  |  |  |  |  | 32,636,000 |  |  |
Share-based compensation arrangement by share-based payment award, number of shares available for grant |  |  |  |  |  |  |  |  |  |  | 869,000 |  |  |
Share-based compensation arrangement by share-based payment award, expiration period |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |
Share-based compensation arrangement by share-based payment award, award vesting period |  |  |  |  |  |  |  |  |  |  | 4 years |  |  |
Share-based compensation arrangement by share-based payment award, options, exercisable, weighted average remaining contractual term |  |  |  |  |  |  |  |  |  |  | 6 years 7 months 6 days |  |  |
Share-based compensation arrangement by share-based payment award, options, exercises in period, intrinsic value |  |  |  |  |  |  |  |  |  |  | $ 0.7 | $ 3.2 |  |
Share-based compensation arrangement by share-based payment award, options, outstanding, intrinsic value |  |  |  |  |  |  |  |  |  |  | $ 1.7 | $ 69.1 |  |
Common stock future issuance on exercise of outstanding options and vesting of outstanding restricted stock units granted |  |  |  |  |  |  |  |  |  |  | 21,747,130 |  |  |
Total unrecognized compensation cost related to non-vested, stock-based payment awards |  |  |  |  |  |  |  |  |  |  | $ 99.7 |  |  |
Total unrecognized compensation cost, expect to recognize over weighted average period |  |  |  |  |  |  |  |  |  |  | 2 years 9 months 18 days |  |  |
Restricted Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, award vesting period |  |  |  |  |  |  |  |  |  |  | 4 years |  |  |
Employee Stock Purchase Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, number of shares authorized |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,000
Share-based compensation arrangement by share-based payment award, number of additional shares authorized | 200,000 | 300,000 | 200,000 | 100,000 | 100,000 | 25,000 | 25,000 |  | 10,000 | 5,000 | 975,000 |  |  |
Share-based compensation arrangement by share-based payment award maximum employee earnings with held to purchase common stock percent |  |  |  |  |  |  |  |  |  |  | 10.00% |  |  |
Share-based compensation arrangement by share-based payment award discount on stock price |  |  |  |  |  |  |  |  |  |  | 85.00% |  |  |
Share-based compensation arrangement by share-based payment award, shares issued in period |  |  |  |  |  |  |  |  |  |  | 175,228 | 193,841 | 125,727 |
Share-based compensation arrangements by share-based payment award, options, exercises in period, weighted average exercise price |  |  |  |  |  |  |  |  |  |  | $ 12.21 | $ 11.95 | $ 16.77 |
Common stock, shares, issued, total |  |  |  |  |  |  |  |  |  |  | 773,978 |  |  |
Common stock, capital shares reserved for future issuance |  |  |  |  |  |  |  |  |  |  | 201,022 |  |  |
Share-based compensation arrangement by share-based payment award, options, grants in period, weighted average grant date fair value |  |  |  |  |  |  |  |  |  |  | $ 7.10 | 9.76 | 14.70 |
Share-based compensation arrangement by share-based payment award, per share weighted-average fair value price of shares purchased |  |  |  |  |  |  |  |  |  |  | $ 3.64 | $ 5.18 | $ 5.94 |
Expected life |  |  |  |  |  |  |  |  |  |  | 6 months |  |  |
Equity Incentive Plan 2007 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, number of shares authorized |  |  |  |  |  |  |  |  |  | 150,000 |  |  |  |
Share-based compensation arrangement by share-based payment award, number of additional shares authorized | 2,000,000 | 7,000,000 | 5,000,000 | 3,000,000 | 4,300,000 | 1,750,000 | 4,500,000 | 100,000 |  |  | 27,800,000 |  |  |
Share-based compensation arrangement by share-based payment award, number of shares available for grant |  |  |  |  |  |  |  |  |  |  | 868,880 |  |  |

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- Definition The purchase price of stock from 1997 Employee Stock Purchase Plan will be the lower of the closing price of common stock on: (i) the first trading day in the enrollment period, as defined in the Purchase Plan, in which the purchase is made, or (ii) the purchase date. + References No definition available. + Details
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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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