v3.20.4

Stock-Based Compensation (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Nov. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Stock Option |  |  |
Stock Based Compensation (Textual) |  |  |
Options authorized (in shares) |  | 8,000,000.0 |
Shares available for issuance (in shares) |  | 6,600,000 | 8,000,000.0
Stock options, accelerated vesting (in shares) | 1,000,000.0 |  |
Stock options, accelerated vesting, amount | $ 0.5 |  |
Stock Option | Directors, officers consultants and employees |  |  |
Stock Based Compensation (Textual) |  |  |
Unrecognized compensation expense |  | $ 0.2 |
Unrecognized compensation expense, unvested awards, period for recognition |  | 1 year 9 months 18 days |
Restricted Stock | Directors, officers consultants and employees |  |  |
Stock Based Compensation (Textual) |  |  |
Unrecognized compensation expense |  | $ 2.9 |
Unrecognized compensation expense, unvested awards, period for recognition |  | 1 year 10 months 24 days |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + 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 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of shares authorized for issuance under share-based payment arrangement. + 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 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + 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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