ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration of Risk (Details) $ in Millions	12 Months Ended
Dec. 31, 2020 USD ($) item	Dec. 31, 2019 USD ($)
Concentration Risk [Line Items]
Accounts receivable related to product sales \| $	$ 40.8	$ 38.4
Customer concentration risk \| Consolidated revenue
Concentration Risk [Line Items]
Number of major distributors \| item	3

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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