Discontinued Operations - Consolidated Statement of Comprehensive Income (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operating tax effect of discontinued operation EWW pipelines	$ 122,500	$ 36,431	$ 373,474	$ 310,808
Net income from discontinued operations	212,879	64,881	649,795	546,827
EWW/Pipeline Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	1,425,475	1,898,325	4,608,504	5,443,786
Cost of sales	(599,876)	(1,047,363)	(2,533,836)	(3,156,194)
Distribution, general & administrative	(384,843)	(426,196)	(779,610)	(784,187)
Maintenance	(32,284)	(47,092)	(80,707)	(88,415)
Depreciation & amortization	0	(179,016)	0	(363,222)
Taxes other than income	(74,834)	(95,829)	(168,588)	(171,375)
Other income	3,313	10,933	7,263	16,263
Interest expense	(203)	(972)	(964)	(1,253)
Pretax income from discontinued operations	336,748	112,790	1,052,062	895,403
Discontinued operating tax effect of discontinued operation EWW pipelines	(123,016)	(41,090)	(384,320)	(326,196)
Net income from discontinued operations	213,732	71,700	667,742	569,207
Independence [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income from discontinued operations	$ (853)	$ (6,819)	$ (17,947)	$ (22,380)