XML 115 R83.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Proxy Contest (Details) $ in Millions | 3 Months Ended
--- | ---
Jun. 30, 2018 USD ($) director
Other Income and Expenses [Abstract] |
Number of directors | director | 8
Proxy contest | $ | $ 7.2

X
- References No definition available. + Details
Name: | us-gaap_OtherIncomeAndExpensesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Directors + References No definition available. + Details
Name: | wfx_NumberOfDirectors
Namespace Prefix: | wfx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Professional Fees Expense (Income) + References No definition available. + Details
Name: | wfx_ProfessionalFeesExpenseIncome
Namespace Prefix: | wfx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration