ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Cash And Cash Equivalents, Resticted Cash And Restricted Cash Equivalents [Roll Forward]
Cash and cash equivalents	$ 23,359	$ 24,185		$ 22,207
Restricted Cash and Cash Equivalents, Current	944	944		944
Restricted Cash and Cash Equivalents, Noncurrent	503	503		4,346
Cash, cash equivalents and restricted cash	$ 24,806	$ 25,632	$ 27,646	$ 27,497