STOCK-BASED COMPENSATION (Details Narrative) - Time Lapse Restricted Shares Issued 2004 [Member] - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting increment, starting with the second anniversary, over six years	20.00%
Award vesting period	6 years
Shares issued during the period (in shares)	600,000	700,000	800,000
Common stock reserved for issuance upon exercise of stock options (in shares)	5,900,000
Unrecognized compensation cost	$ 39,200	$ 32,900
Unrecognized compensation cost, period for recognition	4 years 1 month 6 days	3 years 10 months 24 days

Share Based Compensation Arrangement by Share Based Payment Award Vesting Increment, Percentage

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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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.

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- Definition

Number of shares issued during the period as a result of a stock split.

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