The total number of new claims filed pertaining to a loss contingency during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

Name:	us-gaap_LossContingencyNewClaimsFiledNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Commitments and Contingencies (Details) - Unfavorable Regulatory Action - Pending Litigation - action	Jun. 19, 2018	May 01, 2018
Ecker et al. v. Jacob et al. and Harding v. Jacob et al.
Loss Contingencies [Line Items]
Number of shareholder derivative actions		2
Solak v. Jacob et al.
Loss Contingencies [Line Items]
Number of shareholder derivative actions	4