SHAREHOLDERS' EQUITY - Summary of Assumptions (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Principal assumptions used in applying the Black-Scholes option pricing model for the awards
Risk-free interest rate (as a percent)	4.44%
Risk-free interest rate, low end of range (as a percent)			0.519%
Risk-free interest rate, high end of range (as a percent)			0.873%
Dividend yield (as a percent)	0.00%		0.00%
Volatility factor of the expected market price of common stock (as a percent)	67.00%		63.00%
Weighted-average expected life of option	3 years		3 years 6 months
Weighted-average grant date fair value (in dollars per share)	$ 3.36		$ 1.22
Additional disclosures
Fair value of awards vesting in the period	$ 0.4	$ 0.8	$ 0.8
Unrecognized compensation expense on non-vested stock options (in dollars)	$ 1.9	$ 0.1	$ 0.6
Non-vested stock options outstanding (in shares)	0.6	0.4	0.4
Weighted-average period of recognition	1 year 6 months	10 months 24 days	1 year 4 months 24 days
Stock option expense	$ 0.3	$ 0.3	$ 0.8