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STOCK OPTIONS - SUMMARY OF NONVESTED STOCK OPTIONS (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Number of Options Non-vested at beginning of period (in shares)	1,745,506
Number of Options Non-vested, Granted (in shares)	1,728,000	810,762
Number of Options Non-vested, Vested (in shares)	(797,769)
Number of Options Non-vested, Forfeited (in shares)	(443,302)
Number of Options Non-vested at end of period (in shares)	2,232,435	1,745,506
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant date fair value, Non-vested Options at beginning of period (in dollars per share)	$ 1.25
Weighted average grant date fair value, Non-vested Options, Granted (in dollars per share)	1.82
Weighted average grant date fair value, Non-vested Options, Vested (in dollars per share)	1.01
Weighted average grant date fair value, Non-vested Options, Forfeited (in dollars per share)	1.95
Weighted average grant date fair value, Non-vested Options at end of period (in dollars per share)	$ 1.40	$ 1.25

X

- Definition

Gross number of share options (or share units) granted during the period.

+ References

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Number of non-vested options outstanding.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Number of non-vested options forfeited.

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Weighted average grant-date fair value of non-vested options forfeited.

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