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EMPLOYEE BENEFIT PLANS, Defined Contribution Plan (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
EMPLOYEE BENEFIT PLANS [Abstract]
Employer contribution to 401 (k) defined contribution plan	$ 518,000	$ 446,000	$ 433,000

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- References

No definition available.

+ Details

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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No definition available.

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