INVESTMENTS AND FAIR VALUE MEASUREMENTS - AMORTIZED COST (Details) - USD ($) $ in Thousands	Apr. 30, 2024	Dec. 31, 2023
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	$ 137,646	$ 132,312
Unrealized Gains	7,632	9,675
Unrealized Losses	(5,885)	(4,346)
Fair Value	139,393	137,641
Marketable equity securities | Equity securities
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	50,645	59,228
Unrealized Gains	5,656	7,896
Unrealized Losses	(5,805)	(4,146)
Fair Value	50,496	62,978
Marketable debt securities
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	87,001	73,084
Unrealized Gains	1,976	1,779
Unrealized Losses	(80)	(200)
Fair Value	88,897	74,663
Marketable debt securities | U.S. treasury securities
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	61,306	53,662
Unrealized Gains	825	1,307
Unrealized Losses	(32)	(3)
Fair Value	62,099	54,966
Marketable debt securities | Corporate bonds
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	25,695	19,422
Unrealized Gains	1,151	472
Unrealized Losses	(48)	(197)
Fair Value	$ 26,798	$ 19,697