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CONVERTIBLE NOTES AND OTHER DEBTS - Narrative (Details) $ / shares in Units, € in Millions, shares in Millions |  |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 28, 2022 | Jun. 02, 2020 USD ($) $ / shares | Sep. 13, 2019 USD ($) $ / shares | Jun. 30, 2020 EUR (€) | Dec. 31, 2022 USD ($) day shares | Dec. 31, 2021 USD ($) | Dec. 19, 2019 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Convertible debt, non-current |  |  |  |  | $ 0 | $ 98,941,000 |
Relief loans |  |  |  |  | 5,337,000 | 5,651,000 |
Societe Generale S.A. |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  | 0.51% |  |  |
Proceeds from loans | € |  |  |  | € 5 |  |  |
Relief loans |  |  |  |  | 5,300,000 |  |
Societe Generale S.A. | Other Debts, Current |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Relief loans |  |  |  |  | 1,300,000 |  |
Societe Generale S.A. | Other Debts, Non-current |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Relief loans |  |  |  |  | 4,000,000 |  |
JPMORGAN CHASE BANK N.A. | Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated interest rate (as a percent) | 2.00% |  |  |  |  |  |
Line of credit facility, maturity factor, period required | 90 days |  |  |  |  |  |
Borrowings outstanding |  |  |  |  | $ 0 |  |
Maximum | JPMORGAN CHASE BANK N.A. | Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of credit facility, current borrowing capacity |  |  |  |  |  |  | $ 25,000,000
One Month LIBOR | JPMORGAN CHASE BANK N.A. | Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) | 2.50% |  |  |  |  |  |
SOFR for interest period of one, three or six months | JPMORGAN CHASE BANK N.A. | Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) | 3.00% |  |  |  |  |  |
2022 Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt conversion, converted instrument, shares issued (in shares) | shares |  |  |  |  | 3.9 |  |
2022 Notes | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated interest rate (as a percent) |  | 4.375% |  |  |  |  |
Debt instrument, face amount |  | $ 37,700,000 |  |  |  |  |
Debt instrument, convertible, conversion ratio |  | 0.1739978 |  |  |  |  |
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares |  | $ 5.75 |  |  |  |  |
2024 Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  | $ 115,500,000 | $ 115,500,000 |
2024 Notes | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  | 2.00% |  |  |  |
Debt instrument, face amount |  |  | $ 115,500,000 |  |  |  |
Debt instrument, convertible, conversion ratio |  |  | 0.1155001 |  |  |  |
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares |  |  | $ 8.66 |  |  |  |
Carrying amount of equity component of debt instrument |  |  | $ 24,900,000 |  |  |  |
Convertible debt, non-current |  |  |  |  | $ 114,000,000 |  |
2024 Notes | Senior Notes | Stock price greater or equal 130 percent of Note Conversion Price |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, convertible, threshold trading days | day |  |  |  |  | 20 |  |
Debt instrument, convertible, threshold consecutive trading days | day |  |  |  |  | 30 |  |
Threshold of stock price trigger (as a percent) |  |  |  |  | 130.00% |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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