FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Cash and Cash Equivalents and Short-term Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair value disclosure
Cash and cash equivalents	$ 127,058	$ 76,620
Short-term investments	76,802	48,339
Concentrations of Credit Risk of Financial Instruments
Cash, cash equivalents and short-term investments not FDIC-insured	95,500	42,600
Cash deposits
Fair value disclosure
Cash and cash equivalents	71,987	72,790
Variable rate demand notes
Fair value disclosure
Cash and cash equivalents	231	230
Money market funds
Fair value disclosure
Cash and cash equivalents	54,840	3,600
Certificates of deposit
Fair value disclosure
Short-term investments	37,047	$ 48,339
U.S. Treasury securities
Fair value disclosure
Short-term investments	$ 39,755