ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Sales Reserves (Details) - Reserve for sales returns - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 71	$ 68
Provision related to sales made in current period	778	1,028
Adjustment related to sales made in prior periods	(11)	5
Actual returns or credits related to current period	(728)	(959)
Actual returns or credits related to prior periods	(55)	(71)
Balance at End of Year	$ 55	$ 71