BUSINESS DEVELOPMENT - Narrative (Details) - ISC - Licensing Agreements	Jan. 04, 2019 USD ($)
Schedule Of Asset Acquisition [Line Items]
Upfront payment	$ 1,700,000
Option to acquire, period subsequent to commercial sale	4 years
Maximum future purchase price, if circumstances met (not to exceed)	$ 80,000,000.0
Number of assets acquired	1

The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration