Unbilled Revenue (Details) Mcf in Thousands, $ in Thousands	Sep. 30, 2016 USD ($) Mcf	Jun. 30, 2016 USD ($) Mcf
Deferred Revenue Arrangement [Line Items]
Unbilled revenues	$ 1,462	$ 1,452
Unbilled gas costs	$ 359	$ 319
Unbilled volumes (in Mcf) \| Mcf	62	63

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.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration