COMMITMENTS AND CONTINGENCIES - Leases and Sublease Agreements (Details) - Leases and Sublease Agreements	12 Months Ended
Dec. 31, 2016 USD ($)
San Diego CA
Other Commitments [Line Items]
Annual base rent	$ 1,100,000.0
New York NY
Other Commitments [Line Items]
Annual base rent	500,000.0
CALIFORNIA
Other Commitments [Line Items]
Annual base rent	$ 500,000.0

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration