RESTRUCTURING CHARGES - Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 720,000	$ 0
Employee compensation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	720,000
Employee compensation costs | Chief Executive Officer
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 1,500,000
Spectrum Reorganization Plan | Employee compensation costs
Restructuring Cost and Reserve [Line Items]
Cost incurred, cumulative	$ 3,300,000
Spectrum Reorganization Plan | Facility exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			1,300,000
Restructuring and related cost, expected cost remaining			$ 0