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NONVESTED SHARES (Details) - 2008 Plan - Nonvested shares - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Nonvested shares
Nonvested shares granted	1,829,000	244,000	272,000	296,000	3,154,800	2,800,300	711,571
Vesting period		4 years	4 years
Minimum
Nonvested shares
Vesting period				3 months	3 months	3 years	2 years
Maximum
Nonvested shares
Vesting period				4 years	4 years	4 years	4 years
Vest immediately
Nonvested shares
Nonvested shares granted	1,549,000
Vest over a period of two years
Nonvested shares
Nonvested shares granted	280,000
Vesting period	2 years

X

- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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