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CONVERTIBLE NOTES (Additional Information) (Details) |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 25, 2021 USD ($) $ / shares shares | Dec. 07, 2016 USD ($) shares | Dec. 01, 2016 USD ($) | Jul. 24, 2017 USD ($) | Dec. 31, 2021 USD ($) D shares
Net payment for convertible notes |  |  |  |  | $ 30,036,000
Net proceeds from issuance of convertible notes |  |  |  | $ 9,500,000 |
Loss on extinguishment of convertible notes |  |  |  |  | (831,000)
Reacquisition of equity component of convertible notes |  |  |  |  | 12,019,000
Equity component of convertible notes, net of transaction costs |  |  |  |  | $ 12,027,000
Converted instrument, shares issued | shares |  | 2,384,673 |  |  |
2021 Notes |  |  |  |  |
Face amount |  |  | $ 22,500,000 | $ 10,000,000.0 |
Debt Instrument Carrying Amount | $ 54,650,000 |  |  |  |
Net proceeds from issuance of convertible notes |  |  | $ 19,700,000 |  |
Interest rate | 7.50% |  | 7.50% |  | 7.50%
Loss on extinguishment of convertible notes |  |  |  |  | $ (831,000)
Reacquisition of equity component of convertible notes |  |  |  |  | 12,200,000
Aggregate principal amount |  |  |  |  | $ 0
2024 Notes |  |  |  |  |
Face amount | $ 28,750,000 |  |  |  |
Net payment for convertible notes | 25,900,000 |  |  |  |
Convertible notes exchange in cash, accrued and unpaid interest | 1,100,000 |  |  |  |
Base value for conversion rate | $ 1,000 |  |  |  |
Number of shares for basis conversion | shares | 563.2216 |  |  |  |
Conversion price per share | $ / shares | $ 1.7755 |  |  |  |
Percentage of Premium to Closing Price of Stock | 32.50% |  |  |  |
Interest rate | 7.50% |  |  |  | 7.50%
Mature term |  |  |  |  | 3 years
Reacquisition of equity component of convertible notes |  |  |  |  | $ 12,000,000.0
Transactions costs in connection with the exchange of convertible notes |  |  |  |  | 869,000
Minimum cash balance required |  |  |  |  | $ 7,500,000
Maximum price per share of the conversion feature | shares |  |  |  |  | 746.2686
Aggregate principal amount |  |  |  |  | $ 28,750,000
Redemption, description |  |  |  |  | Prior to the maturity date, the Company may redeem in cash
Threshold trading days | D |  |  |  |  | 20
Threshold consecutive trading days | D |  |  |  |  | 30
Threshold Percentage Of Conversion Price |  |  |  |  | 130.00%
Aggregate percentage of principle amount |  |  |  |  | 15.00%
Amount of redemption of debt |  |  |  |  | $ 0
Percentage of outstanding capital stock |  |  |  |  | 100.00%
Denomination of the principal amount of debt |  |  |  |  | $ 1,000
Redemption price, percentage |  |  |  |  | 100.00%
2024 Notes | Minimum |  |  |  |  |
Number of calendar days after the date of applicable fundamental change purchase date | D |  |  |  |  | 20
2024 Notes | Maximum |  |  |  |  |
Number of calendar days after the date of applicable fundamental change purchase date | D |  |  |  |  | 35
4.5% Convertible Notes [Member] |  |  |  |  |
Debt Instrument Carrying Amount |  |  | $ 54,100,000 |  |
Convertible Notes Due Two Thousand Twenty One [Member] |  |  |  |  |
Face amount |  | $ 40,186,000 |  |  |

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