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Stock-Based Compensation and Other Benefit Plans - 401(k) Retirement Plan (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2015 | Dec. 31, 2020 | Dec. 31, 2019
Defined Contribution Plan |  |  |
Compensation expense related to 401(k) retirement plan |  | $ 0.2 | $ 0.7
Up to 2 Percent |  |  |
Defined Contribution Plan |  |  |
Company match | 100.00% |  |
Employee contribution | 2.00% |  |
From 5 to 8 Percent |  |  |
Defined Contribution Plan |  |  |
Employee contribution | 50.00% |  |
From 5 to 8 Percent | Minimum |  |  |
Defined Contribution Plan |  |  |
Employee contribution | 5.00% |  |
From 5 to 8 Percent | Maximum |  |  |
Defined Contribution Plan |  |  |
Employee contribution | 8.00% |  |

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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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 Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + 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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