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STOCK AWARD PLAN AND STOCK-BASED COMPENSATION - Summary of Assumptions Used in Black Scholes Model to Estimate Fair Value of Stock Options (Parenthetical) (Details) - shares | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Employee Stock Option |  |
Stock Award Plan and Stock-Based Compensation |  |
Shares issued | 0 |
Non-Employees Stock Options |  |
Stock Award Plan and Stock-Based Compensation |  |
Shares issued | 0 | 40,000

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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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Balance Type: | na
Period Type: | duration

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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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Data Type: | xbrli:sharesItemType
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Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |