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STOCK-BASED COMPENSATION PLANS (Details 3) shares in Thousands	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Outstanding Number of Shares | shares | shares	1,885
WA Remaining Contractual Life (years)	6 years 3 months 25 days
WA Outstanding Strike Price	$ 0.80
Exercisable Number of Shares | shares | shares	1,317
Remaining Exercisable Contractual Life (years)	5 years 2 months 19 days
WA Exercisable Strike Price	$ 0.44
Exercise Price Range One [Member]
Exercise Price Minimum	0
Exercise Price Maximum	$ 1.00
Outstanding Number of Shares | shares | shares	1,542
WA Remaining Contractual Life (years)	5 years 8 months 16 days
WA Outstanding Strike Price	$ 0.37
Exercisable Number of Shares | shares | shares	1,254
Remaining Exercisable Contractual Life (years)	5 years 1 month 13 days
WA Exercisable Strike Price	$ 0.35
Exercise Price Range Two [Member]
Exercise Price Minimum	1.01
Exercise Price Maximum	$ 2.00
Outstanding Number of Shares | shares | shares	31
WA Remaining Contractual Life (years)	5 years 29 days
WA Outstanding Strike Price	$ 1.36
Exercisable Number of Shares | shares | shares	19
Remaining Exercisable Contractual Life (years)	2 years 6 months 25 days
WA Exercisable Strike Price	$ 1.19
Exercise Price Range Three [Member]
Exercise Price Minimum	2.01
Exercise Price Maximum	$ 3.00
Outstanding Number of Shares | shares | shares	221
WA Remaining Contractual Life (years)	9 years 3 months 11 days
WA Outstanding Strike Price	$ 2.63
Exercisable Number of Shares | shares | shares	44
Remaining Exercisable Contractual Life (years)	9 years 2 months 12 days
WA Exercisable Strike Price	$ 2.63
Exercise Price Range Four [Member]
Exercise Price Minimum	3.01
Exercise Price Maximum	$ 4.00
Outstanding Number of Shares | shares | shares	91
WA Remaining Contractual Life (years)	9 years 10 months 10 days
WA Outstanding Strike Price	$ 3.44
Exercisable Number of Shares | shares | shares	0
Remaining Exercisable Contractual Life (years)	0 years
WA Exercisable Strike Price	$ 0

X

- Definition

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.

+ References

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-Section 50
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- Definition

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.

+ References

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- Definition

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.

+ References

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- Definition

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

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- Definition

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

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- Definition

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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