RELATED-PARTY TRANSACTIONS - Conversion of Series A Preferred Stock to Common Stock (Narrative) (Details) $ / shares in Units, $ in Millions	1 Months Ended	6 Months Ended
	Sep. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2024 shares $ / shares	Jun. 30, 2023 shares	Dec. 31, 2023 $ / shares shares
Related Party Transaction [Line Items]
Preferred stock, par value (in usd per share) | $ / shares	$ 0.001	$ 0.001		$ 0.001
Preferred stock, shares outstanding (in shares)		0		0
5.00% Convertible Notes Due 2026 | Convertible Notes
Related Party Transaction [Line Items]
Common stock issuable upon conversion (in shares)		9,600,000	9,300,000
Series A Preferred Stock | 5.00% Convertible Notes Due 2026 | Convertible Notes
Related Party Transaction [Line Items]
Common stock issuable upon conversion (in shares)			400,000
Schuler Trust | Affiliated Entity | Series A Preferred Stock
Related Party Transaction [Line Items]
Agreement to purchase preferred shares (in shares)	4,000,000.0
Purchase price (in dollars per share) | $ / shares	$ 7.70
Aggregate purchase price | $	$ 30.5
Conversion of preferred stock into common stock with related party (in shares)	4,000,000.0
Preferred stock, shares outstanding (in shares)				0