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Represents the number of quarters from the date of grant subsequent to initial vesting, over which the awards vest.

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Represents the term of awards granted in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Represents the information pertaining to fair value of options granted. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Options, Forfeitures Rate

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Carrying value as of the balance sheet date of obligations incurred and payable for incentive compensation awarded to employees and directors or earned by them based on the terms of one or more relevant arrangements.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested options awarded to employees as compensation.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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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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Number of additional shares authorized for issuance under an established share-based compensation plan.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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

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Number of shares for which recognition of compensation cost was accelerated.

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Percentage of vesting of share-based compensation awards.

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Number of options vested.

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STOCK-BASED COMPENSATION (Narrative) (Details) $ / shares in Units, $ in Thousands				1 Months Ended				3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Jan. 25, 2018 USD ($) shares	Aug. 08, 2016	Jun. 30, 2017 shares	Jan. 31, 2017 shares	Aug. 31, 2016 shares	Jun. 30, 2016 shares	Sep. 30, 2018 USD ($) quarter $ / shares shares	Sep. 30, 2017 USD ($) quarter shares	Sep. 30, 2018 USD ($) quarter $ / shares shares	Sep. 30, 2017 USD ($) quarter $ / shares shares	Dec. 31, 2017 USD ($)	Jul. 01, 2017 shares	Jan. 31, 2014 shares
Common stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares) \| shares								110,000	131,500	227,500	299,880
Vested (in shares) \| shares										114,591	125,880
Unrecognized compensation expense related to unvested employee stock option								$ 1,200		$ 1,200
Options outstanding, aggregate intrinsic value								300		300
Options vested, aggregate intrinsic value								$ 190		$ 190
Share price (in dollars per share) \| $ / shares								$ 4.06		$ 4.06
Weighted average period										3 years
Granted (in dollars per share) \| $ / shares										$ 4.77
Common stock options \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, lower limit (in dollars per share) \| $ / shares											$ 4.36
Common stock options \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, upper limit (in dollars per share) \| $ / shares											$ 4.68
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation								$ 1,200	$ 564	$ 3,300	$ 1,700
Unrecognized compensation expense related to unvested employee stock option								$ 6,900		$ 6,900
Weighted average period										2 years 3 months 26 days
Granted (in shares) \| shares										1,379,905
Vested (in shares) \| shares										621,263
Granted (in dollars per share) \| $ / shares										$ 4.81
Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance bonus amount, percent of estimate								10.00%
2014 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of common stock approved for issuance (in shares) \| shares								5,950,000		5,950,000				1,400,000
Number of additional shares authorized (in shares) \| shares				3,250,000			1,300,000
Employees and Consultants \| Common stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of award										10 years
Aggregate grant date fair value of options granted								$ 345		$ 738
Employees \| Common stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, lower limit (in dollars per share) \| $ / shares										$ 4.12	$ 4.36
Exercise price range, upper limit (in dollars per share) \| $ / shares										$ 5.96	$ 4.68
Term of award											10 years
Number of quarters over which awards vest, grant date subsequent to initial vesting \| quarter								16		16
Aggregate grant date fair value of options granted									356		$ 802
Stock compensation								$ 125	100	$ 347	$ 332
Forfeitures rate										6.00%	6.00%
Consultants \| Common stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation								2	2	$ 6	$ 7
Employees and directors \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Bonus percentage										10.00%
Non-executive employees \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Bonus percentage												10.00%
Non-executive employees \| Non-executive Bonus Program 2017 \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of common stock approved for issuance (in shares) \| shares													300,000
Granted (in shares) \| shares		180,528
Stock compensation								77		$ 242
Unrecognized compensation expense related to unvested employee stock option		$ 1,100
Award vesting rights, percent												25.00%
Accrued Bonuses												$ 436
Executives \| Common stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated vesting, number of shares impacted \| shares					8,752
Option exercise period extended, number of shares impacted \| shares					17,504
Plan modification, incremental compensation cost								0			19
Executives \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated vesting, number of shares impacted \| shares					8,815
Plan modification, incremental compensation cost								0			36
Executives \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares) \| shares						250,000
Award vesting rights, percent			50.00%
Executives \| Performance Based Awards \| Maximum \| Forecast
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percent	50.00%
Executives \| 2015 Performance Plan \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in dollars per share) \| $ / shares										$ 5.06
Common Stock \| 2017 Incentive Bonus Program \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation								0	0
Common Stock \| Non-executive Bonus Program 2017 \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation								0	0
Common Stock \| 2018 Incentive Bonus Program \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period												10 days
Stock compensation										$ 608	0
Common Stock \| Employees and directors \| 2018 Incentive Bonus Program \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation								919		292
Common Stock \| Employees and directors \| 2018 Incentive Bonus Program \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation								408		1,200
Common Stock \| Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation										$ 0
Common Stock \| Executives \| 2015 Performance Plan \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period										1 year
Stock compensation									6	$ 18	19
Compensation cost not yet recognized								24		24
Common Stock \| Executives \| 2017 Incentive Bonus Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation									193		943
Common Stock \| Chief Executive Officer \| 2018 Incentive Bonus Program \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation								14		42
Accrued Bonuses								42		42
Research and development expenses \| Common Stock \| 2017 Incentive Bonus Program \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation									$ 153		584
Research and development expenses \| Common Stock \| Non-executive Bonus Program 2017 \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation								62		195
Research and development expenses \| Common Stock \| 2018 Incentive Bonus Program \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation								269		770
General and administrative expenses \| Common Stock \| 2017 Incentive Bonus Program \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation										40	$ 359
General and administrative expenses \| Common Stock \| Non-executive Bonus Program 2017 \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation								15		47
General and administrative expenses \| Common Stock \| 2018 Incentive Bonus Program \| Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation								$ 139		$ 441
Nine days after grant date \| Employees \| Common stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to vest (in shares) \| shares									91,500		91,500
Number of days after grant, expected vesting											9 days
Sixteen quarters after grant date \| Employees \| Common stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to vest (in shares) \| shares									82,500		82,500
Number of quarters over which awards vest, grant date subsequent to initial vesting \| quarter									16		16