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RELATED PARTY TRANSACTIONS AND CERTAIN OTHER TRANSACTIONS (Details) - Chief Executive Officer - USD ($)		3 Months Ended		6 Months Ended
	Nov. 13, 2013	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Aircraft lease agreement
Related Party Transaction [Line Items]
Rate to lease aircraft	$ 5,000
Sales, general and administrative
Related Party Transaction [Line Items]
Aircraft leasing expenses		$ 500,000	$ 900,000	$ 400,000	$ 700,000

X

- Definition

Expenses incurred related to the lease of aircraft from outside third parties that are used in the entity's business operations.

+ References

No definition available.

+ Details

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X

- Definition

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.

+ References

No definition available.

+ Details

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X

- Definition

Aircraft Leasing Hourly Rate

+ References

No definition available.

+ Details

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Namespace Prefix:	wfx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Details

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X

- Details

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X

- Details

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