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STOCKHOLDERS' EQUITY - Incentive Plans (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019 | Jan. 29, 2020
General and administrative |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |
Allocated share based compensation credit |  |  |  | $ 5,800,000 |  |
Compensation expense recorded | $ 800,000 | $ 1,000,000 | $ 1,200,000 |  |  |
2016 Incentive Plan |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |
Incremental reduction to stock-based compensation expense |  |  |  | $ 8,400,000 |  |
2016 Incentive Plan | Stock options |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |
Percentage of awards vesting on the annual anniversary date of the grant |  |  | 25.00% | 33.33% |  |
Vesting period |  |  |  |  | 3 years |
Expiration term |  |  |  |  | 10 years |
Weighted average remaining vesting period |  |  |  | 7 months 6 days |  |
Number of Shares |  |  |  |  |  |
Granted (in shares) |  |  |  | 0 |  |
Restricted stock |  |  |  |  |  |
Unrecognized compensation expense stock option |  | $ 900,000 |  | $ 900,000 |  |
2020 Incentive Plan | Common Stock |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |
Aggregate number of shares available |  |  |  |  |  | 1,500,000
2020 Incentive Plan | Common Stock | Maximum |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |
Maximum number of shares that remained reserved for issuance under the Plan | 200,000 |  | 200,000 |  |  |
2020 Incentive Plan | Stock options |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |
Vesting period |  |  | 4 years |  |  |
Expiration term |  |  | 7 years |  |  |
Weighted average remaining vesting period |  |  | 2 years 1 month 6 days |  |  |
Number of Shares |  |  |  |  |  |
Granted (in shares) |  |  | 500,000 |  |  |
Restricted stock |  |  |  |  |  |
Weighted average grant date fair value of the shares granted |  |  | $ 28.32 |  |  |
Unrecognized compensation expense stock option | $ 1,300,000 |  | $ 1,300,000 |  |  |
2020 Incentive Plan | Stock options | Minimum |  |  |  |  |  |
Weighted Average Exercise Price Per Share |  |  |  |  |  |
Exercised (in dollars per share) |  |  | $ 18.91 |  |  |
2020 Incentive Plan | Stock options | Maximum |  |  |  |  |  |
Weighted Average Exercise Price Per Share |  |  |  |  |  |
Exercised (in dollars per share) |  |  | $ 37.83 |  |  |

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- Definition The aggregate weighted average fair value at grant date for nonvested equity-based awards issued 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) granted during the period. + 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=116856206&loc=d3e5070-113901 + Details
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