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SHARE CAPITAL (Narrative) (Details) - USD ($) |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 13, 2018 | Dec. 07, 2016 | May 22, 2018 | Jul. 24, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 02, 2016 | Dec. 14, 2006
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Common stock available for issuance |  |  |  |  | 7,303,119 |  |  |  | 23,841,655
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized |  |  |  |  | $ 1,524,000 |  |  |  |
Proceeds from Stock Options Exercised |  |  |  |  | 0 | $ 0 | $ 14,000 |  |
Debt Conversion, Converted Instrument, Amount |  |  |  |  | 2,285,000 | $ 16,263,000 |  |  |
Debt Conversion, Converted Instrument, Shares Issued |  | 23,846,735 |  |  |  | 11,239,641 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value |  |  |  |  | $ 0 | $ 0 | $ 213,000 |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition |  |  |  |  | 1 year 2 months 5 days |  |  |  |
4.5% Convertible Notes [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Amount |  |  | $ 2,230,000 |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued |  |  | 2,613,636 |  |  |  |  |  |
Principal amount |  | $ 54,052,000 | $ 3,423,000 | $ 9,000,000 |  |  |  |  |
Debt Instrument Maturity Year |  |  |  | 2018 years |  |  |  |  |
Convertible Notes Due Two Thousand Twenty One [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Principal amount |  | $ 40,186,000 |  |  |  |  |  |  |
Seven Point Five Percentage Convertible Notes [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued |  |  |  |  |  |  | 1,176.4706 |  |
Principal amount |  |  |  | $ 10,000,000 |  |  |  | $ 22,500,000 |
Debt Instrument Maturity Year |  |  |  | 2021 years |  |  |  |  |
Four Point Five Percentage Convertible Notes One [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Principal amount |  |  |  | $ 8,550,000 |  |  |  |  |
Debt Instrument Maturity Year |  |  |  | 2022 years |  |  |  |  |
Officers And Certain Employees [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures | 2,360,000 |  |  |  |  |  |  |  |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ 0.51 |  |  |  |  |  |  |  |
Executive Officer [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Grant Date Fair Value |  |  |  |  | $ 1,200,000 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures | 4,000,000 |  |  |  |  |  |  |  |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price |  |  |  |  | $ 0.56 |  |  |  |
Non-executive Officers [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Strike Price | $ 0.51 |  |  |  |  |  |  |  |
Option to purchase shares of common stock [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | 10 years |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Grant Date Fair Value | $ 1,900,000 |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate | 64.30% |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | 2.90% |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures | 6,360,000 |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate | 0.00% |  |  |  |  |  |  |  |
Option to purchase shares of common stock [Member] | Executive Officer [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ 0.56 |  |  |  |  |  |  |  |

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