v3.19.1

COMPENSATION PLANS (Schedule of Fair Value Assumptions) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Service And Market Condition Based Vesting [Member] | Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price on grant date		$ 2.29	$ 1.03
Risk free interest rate		1.70%	1.30%
Dividend yield		0.00%	0.00%
Expected volatility		81.70%	86.20%
Expected life		5 years	5 years
Service And Market Condition Based Vesting [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price on grant date	$ 3.90	$ 2.29	$ 1.03
Risk free interest rate	2.90%	2.20%	1.90%
Dividend yield	0.00%	0.00%	0.00%
Expected volatility	75.00%	81.70%	86.20%
Expected life	10 years	10 years	10 years
Service Based Vesting [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price on grant date	$ 3.90	$ 2.29	$ 1.03
Risk free interest rate	1.10%	1.60%	1.80%
Dividend yield	0.00%	0.00%	0.00%
Expected volatility	72.80%	71.50%	63.80%
Expected life	6 years	6 years	6 years 3 months

X

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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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.

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No definition available.

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- Definition

Price of a single share of a number of saleable stocks of a company.

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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