Discontinued Operations - Additional Information (Detail) - USD ($)			3 Months Ended
	Jul. 01, 2015	Nov. 06, 2013	Dec. 31, 2013
Schedule Of Discontinued Operations [Line Items]
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax, Total			$ 7,915
Energy West Wyoming, Inc [Member]
Schedule Of Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	$ 14,600,000
Shoshone Pipelines [Member]
Schedule Of Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	$ 1,200,000
Blue Ridge Energies LLC [Member]
Schedule Of Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses		$ 2,300,000