COMMITMENTS AND CONTINGENCIES - Purchase and Other Commitments (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Manufacturing
Long-term Purchase Commitment [Line Items]
Non-cancelable purchase obligations	$ 0.7	$ 3.6
Consulting Services
Long-term Purchase Commitment [Line Items]
Non-cancelable purchase obligations	$ 1.8	$ 2.4

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.

No definition available.

Name:	us-gaap_LongTermPurchaseCommitmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration