DEBT AND FINANCING ARRANGEMENTS - Narrative (Details)	Sep. 22, 2020 USD ($) numberOfDays $ / shares	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	May 21, 2018 USD ($)
Debt Instrument [Line Items]
Debt instrument, face amount		$ 230,000,000
Debt issuance costs, net		$ 2,496,000	$ 3,953,000
Maximum borrowing capacity, percentage of accounts receivable		50.00%
Debt instrument, interest rate		1.64%	1.64%
Debt Instrument, Interest Rate, Stated Percentage		1.00%
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	130.00%
Debt Instrument, Convertible, Conversion Ratio	11.7457
Conversion Price (in usd per share) | $ / shares	$ 85,140
Debt Instrument, Redemption Price, Percentage	100.00%
Proceeds from issuance of convertible senior notes, net of issuance costs paid of $6,900	$ 222,700,000
Debt Instrument, Call Feature	26.5 million
Debt Instrument, Convertible, Threshold Consecutive Trading Days | numberOfDays	30,000
Accumulated deficit		$ (1,111,272,000)	$ (976,570,000)
Long-term debt		30,073,000	0
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Accumulated deficit				$ 11,300,000
Long-term debt				40,200,000
Additional Paid in Capital				$ 51,500,000
Line of Credit [Member]
Debt Instrument [Line Items]
Debt issuance costs, gross		839,000	791,000
Debt issuance costs, net		$ 59,000	198,000
Debt instrument, interest rate increase event of default		3.00%
Long-term finance lease liabilities					$ 27,400,000
Term loans
Debt Instrument [Line Items]
Debt instrument, face amount					20,000,000
Debt issuance costs, gross		$ 7,275,000	7,275,000
Debt issuance costs, net		2,496,000	3,953,000
Long-term finance lease liabilities		$ 30,000,000	$ 0
Revolving Credit Facility | Line of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 30,000,000