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SHARE-BASED COMPENSATION - Options Exercise Price Range, Outstanding and Exercisable (Details)	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Options Outstanding
Number of options outstanding (in shares) | shares	56,862
Weighted Average Exercise Price (in dollars per share)	$ 15.06
Weighted Average Remaining Contractual Term	2 years 8 months 19 days
Options Exercisable
Number Exercisable (in shares) | shares	56,862
Weighted Average Exercise Price (in dollars per share)	$ 15.06
$3.39-$13.50
Outstanding and exercisable stock options under the EIP
Exercise price, low end of range (in dollars per share)	3.39
Exercise price, high end of range (in dollars per share)	$ 13.50
Options Outstanding
Number of options outstanding (in shares) | shares	49,039
Weighted Average Exercise Price (in dollars per share)	$ 6.47
Weighted Average Remaining Contractual Term	2 years 11 months 27 days
Options Exercisable
Number Exercisable (in shares) | shares	49,039
Weighted Average Exercise Price (in dollars per share)	$ 6.47
$54.40-$99.90
Outstanding and exercisable stock options under the EIP
Exercise price, low end of range (in dollars per share)	54.40
Exercise price, high end of range (in dollars per share)	$ 99.90
Options Outstanding
Number of options outstanding (in shares) | shares	7,823
Weighted Average Exercise Price (in dollars per share)	$ 68.94
Weighted Average Remaining Contractual Term	11 months 27 days
Options Exercisable
Number Exercisable (in shares) | shares	7,823
Weighted Average Exercise Price (in dollars per share)	$ 68.94

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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