COMMITMENTS AND CONTINGENCIES - Indemnification Agreement (Details)	Dec. 31, 2016 USD ($)
Indemnification Agreement
Commitments and contingencies
Indemnification agreement with certain officers, maximum (up to)	$ 10,000,000

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