ORGANIZATION AND NATURE OF BUSINESS; BASIS OF PRESENTATION; PRINCIPLES OF CONSOLIDATION; SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands			1 Months Ended		3 Months Ended		6 Months Ended
	Jan. 23, 2024 USD ($)	Jul. 11, 2023	May 31, 2024 USD ($)	Mar. 31, 2023	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Apr. 30, 2024	Dec. 31, 2023 USD ($)	Jun. 09, 2023	Mar. 15, 2023	Mar. 31, 2018
Property, Plant and Equipment [Line Items]
Reverse stock split ratio		0.1
Accumulated deficit					$ 694,675		$ 694,675			$ 668,857
Net loss					11,588	$ 32,735	25,818	$ 49,530
Net cash used in operating activities							16,035	$ 24,188
Working capital deficit					3,800		3,800
Cash and cash equivalents and investments					$ 9,700		9,700			$ 13,200
Increase in cash and cash equivalents and investments							$ (3,500)
Instrument warranty term							1 year
Kits and accessories warranty term							60 days
Lease extension					1 year		1 year
Lessor lease term					5 years		5 years
Expected dividend rate							0.00%
Schuler Trust
Property, Plant and Equipment [Line Items]
Net proceeds	$ 11,000		$ 2,700
Liabilities, Outstanding Notes | Lender Concentration Risk | Ad Hoc Noteholder Group
Property, Plant and Equipment [Line Items]
Risk concentration				85.00%
Instruments
Property, Plant and Equipment [Line Items]
Estimated useful life of assets					5 years		5 years
Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life of assets					1 year		1 year
Finance lease term					2 years		2 years
Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life of assets					10 years		10 years
Operating lease term					6 years		6 years
Finance lease term					3 years		3 years
2.50% Convertible Notes Due 2023 | Convertible Notes
Property, Plant and Equipment [Line Items]
Interest rate					2.50%	2.50%	2.50%	2.50%	2.50%	2.50%		2.50%	2.50%
5.00% Convertible Notes Due 2026 | Convertible Notes
Property, Plant and Equipment [Line Items]
Interest rate					5.00%	5.00%	5.00%	5.00%		5.00%	5.00%