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EQUITY INCENTIVE PLAN (Narrative) (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation |  | $ 100 | $ 100 | $ 300 | $ 200 |
Unrecognized compensation expense related to unvested stock awards |  | 2,200 |  | $ 2,200 |  |
Unvested stock options, unrecognized compensation expense weighted average recognition period |  |  |  | 2 years 6 months |  |
Accrued expenses |  | $ 1,325 |  | $ 1,325 |  | $ 1,583
Stock Options [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock options, expected to vest, outstanding (in shares) |  | 400,693 |  | 400,693 |  |
Stock options, expected to vest, outstanding, aggregate intrinsic value |  | $ 200 |  | $ 200 |  |
Stock options, expected to vest remaining contractual term |  |  |  | 9 years 2 months 12 days |  |
Equity Incentive Plan 2017 [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of additional shares authorized | 359,300 |  |  |  |  |
Number of shares authorized | 403,744 |  |  |  |  |
Maximum number of shares per employee | 66,666 |  |  |  |  |
Award plan, percentage of outstanding stock maximum | 5.00% |  |  |  |  |
Equity Incentive Plan 2017 [Member] | Stock Options [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares available for issuance |  |  |  | 44,444 |  |
Plan expiration date |  |  |  | Jun. 05, 2027 |  |

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- Definition 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). + References 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition 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. + References 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 (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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