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

COMMITMENTS AND CONTINGENCIES (Details) - Pending Litigation	Sep. 28, 2018 claim	Apr. 18, 2014 item
City of Providence
Loss Contingencies
The number of other securities exchanges a lawsuit has been filed against \| item		14
VIX Litigation
Loss Contingencies
Number of Commodity Exchange Act claims \| claim	3