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SHARE-BASED COMPENSATION - Plan (Details) - USD ($) $ in Thousands |  |  |  | 3 Months Ended
--- | --- | --- | --- | ---
Mar. 27, 2020 | Aug. 02, 2019 | Feb. 07, 2019 | Mar. 31, 2020
SHARE-BASED COMPENSATION |  |  |  |
Number of shares may be issued to employees, directors, consultants and nonemployee service providers in the form of stock options, stock and stock appreciation rights |  |  |  | 10,000,000
Number of shares available for grant |  |  |  | 9,800,000
Stock options |  |  |  |
SHARE-BASED COMPENSATION |  |  |  |
Contractual life |  |  |  | 10 years
Senior management | Restricted shares |  |  |  |
SHARE-BASED COMPENSATION |  |  |  |
Restricted shares granted (in shares) |  | 39,526 | 120,000 |
Grant date fair value |  | $ 496 | $ 1,636 |
Vesting percentage |  | 20.00% | 14.30% |
Senior management | Stock options |  |  |  |
SHARE-BASED COMPENSATION |  |  |  |
Vesting percentage |  |  | 12.50% |
Independent directors | Restricted shares |  |  |  |
SHARE-BASED COMPENSATION |  |  |  |
Restricted shares granted (in shares) | 1,903 |  | 2,936 |

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- Definition Represents the aggregate fair value of grants made during the period on other than stock option plans. + References No definition available. + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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=109197908&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=109197908&loc=d3e5070-113901 + Details
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- Definition Percentage of vesting of share-based compensation awards. + 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)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the 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 (a)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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