ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently Adopted and Issued Accounting Pronouncements (Details) - Convertible debt - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reacquisition of equity component		$ 19,532
Additional Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reacquisition of equity component	$ 19,500	$ 19,532	[1]

[1] Adjusted to reflect the 1-for-4 reverse stock split effected on May 18, 2021.