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Employee Benefit Plan (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Retirement Benefits [Abstract] |  |  |
Defined contribution plan employer matching percent | 50.00% |  |
Defined contribution plan maximum employee contribution percent | 6.00% |  |
Defined contribution plan vesting period | 4 years |  |
Defined contribution plan matching amount | $ 0.9 | $ 0.8 | $ 0.9

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- References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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- Definition Period which an employee's right to employer matching contribution to defined contribution plan is no longer contingent on satisfaction of a service condition. + References No definition available. + Details
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