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CONVERTIBLE NOTES (Narrative) (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 07, 2016 | Jul. 31, 2017 | Jul. 24, 2017 | Jun. 24, 2017 | Apr. 30, 2017 | Dec. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 02, 2016 | Sep. 18, 2013
Number of shares for basis conversion |  |  |  |  |  |  |  |  |  |  | 173.6593
Net proceeds from issuance of convertible notes |  |  | $ 9,500,000 |  |  |  | $ 9,542,000 | $ 19,681,000 |  |  |
Principal amount, related to the initial purchaser's over-allotment option |  |  |  |  |  |  |  |  |  |  | $ 9,000,000
Debt Conversion, Converted Instrument, Amount |  |  |  |  |  |  | 16,263,000 |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  | $ (1,325,000) | 14,063,000 |  |  |
Percentage Of Excess Shares Outstanding |  |  |  |  |  |  | 20.00% |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued | 23,846,735 |  |  |  |  |  | 11,239,641 |  |  |  |
Repayments of Convertible Debt |  |  |  |  |  |  | $ 10,961,000 |  |  |  |
Stockholders Approval Description For Common Stock Issuance |  |  |  |  | the issuance of shares in excess of 20% of its outstanding shares. On April 12, 2017, the Companys stockholders approved the issuance of shares of the Companys Common Stock in excess of 20% of the Companys outstanding shares of Common Stock to settle conversion requests and pay interest on the Companys issued 7.5% convertible notes. |  |  |  |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net |  |  |  |  |  |  | $ (38,061,000) | $ (6,473,000) |  |  |
Convertible Notes Payable [Member] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  | $ 69,000,000
Seven Point Five Percentage Convertible Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  | $ 10,000,000 |  |  |  |  |  | $ 22,500,000 |
Maturity |  |  |  |  |  | Nov. 15, 2021 |  |  |  |  |
Interest rate |  |  |  | 0.00% |  |  | 7.50% |  |  | 7.50% |
Conversion price per share |  |  |  |  |  |  | $ 0.85 |  |  |  |
Base value for conversion rate |  |  |  |  |  | $ 1,000 | $ 1,000 |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  | 14,100,000 |  |  |  |
Maximum Debt Instrument Convertible Conversion Share Number |  |  |  |  |  | $ 1,787.3100 |  |  |  |  |
Debt Instrument, Redemption, Description |  |  |  |  |  | Prior to the maturity date, the Company may redeem in cash: a) any or all of the 2016 Notes if the last reported sale price of the common stock for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days exceeds 150% of the conversion price on each applicable trading day, or b) all of the 2016 Notes then outstanding if the aggregate principal amount of the 2016 Notes then outstanding is less than 15% of the aggregate principal amount of the notes issued. |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued |  |  |  |  |  | 1,176.4706 |  |  |  |  |
Debt Instrument Maturity Year |  |  |  | 2021 years |  |  |  |  |  |  |
Four Point Five Percentage Convertible Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | 9,000,000 | $ 9,000,000 |  |  |  |  |  |  |
Interest rate | 4.50% |  |  | 4.50% |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Amount | $ 54,052,000 |  |  |  |  | $ 54,100,000 |  |  |  |  |
Debt Instrument Maturity Year |  |  |  | 2018 years |  |  |  |  |  |  |
Convertible Notes Due Two Thousand Twenty One [Member] |  |  |  |  |  |  |  |  |  |  |
Principal amount | 40,186,000 |  |  |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Amount | $ 40,186,000 |  |  |  |  |  |  |  |  |  |
Convertible Notes 2013 [Member] |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  |  |  |  | 4.50%
Conversion price per share |  |  |  |  |  |  |  |  |  |  | $ 5.76
Four Point Five Percentage Convertible Notes 2013 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Amount |  | $ 9,000,000 |  |  |  |  | $ 5,900,000 |  |  |  |
Seven Point Five Percentage Convertible Notes 2016 [Member] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | 10,000,000 |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued |  |  |  |  |  |  | 8,827,624 |  |  |  |
Repayments of Convertible Debt |  |  |  |  |  |  | $ 11,000,000 |  |  |  |
Long-term Debt, Gross |  |  |  |  |  |  | 59,100,000 |  |  |  |
Debt Conversion, Original Debt, Amount |  |  |  |  |  |  | $ 13,600,000 |  |  |  |
Four Point Five Percentage Convertible Notes One [Member] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 8,550,000 | $ 8,550,000 |  |  |  |  |  |  |
Interest rate |  |  | 4.50% | 4.50% |  |  |  |  |  |  |
Repayments of Convertible Debt |  |  | $ 275,000 |  |  |  |  |  |  |  |
Debt Instrument Maturity Year |  |  | 2022 years | 2022 years |  |  |  |  |  |  |

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