FINANCIAL INSTRUMENTS - Cash and Financial Assets That are Measured at Fair Value on a Recurring Basis for Each of the Hierarchy Levels (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Cash And Cash Equivalents And Marketable securities [Line Items]
Cost	$ 61,069	$ 109,464
Unrealized Gains	0	21
Accrued Interest	0	59
Estimated Fair Value	61,069	109,544
Cash & Cash Equivalents	61,069	104,183
Investment Securities	0	5,361
Cash
Cash And Cash Equivalents And Marketable securities [Line Items]
Cost	60,277	94,824
Estimated Fair Value	60,277	94,824
Cash & Cash Equivalents	60,277	94,824
Level 1:
Cash And Cash Equivalents And Marketable securities [Line Items]
Cost		10,760
Unrealized Gains		12
Estimated Fair Value		10,772
Cash & Cash Equivalents		9,359
Investment Securities		1,413
Level 1: | Money market accounts
Cash And Cash Equivalents And Marketable securities [Line Items]
Cost	792	9,359
Estimated Fair Value	792	9,359
Cash & Cash Equivalents	$ 792	9,359
Level 1: | Government & agency securities
Cash And Cash Equivalents And Marketable securities [Line Items]
Cost		1,401
Unrealized Gains		12
Estimated Fair Value		1,413
Investment Securities		1,413
Level 2: | Municipal bonds
Cash And Cash Equivalents And Marketable securities [Line Items]
Cost		3,880
Unrealized Gains		9
Accrued Interest		59
Estimated Fair Value		3,948
Investment Securities		$ 3,948