Earnings per Share Summary of Earnings Per Share (Detail) (USD $)	3 Months Ended												12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014		Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator:
Income from continuing operations	$ 1,200,689	$ (1,514,569)	[1]	$ (1,493,499)	$ 4,536,545	$ 2,797,734	[2]	$ (850,046)	[3]	$ (429,753)	[4]	$ 4,334,206	$ 2,729,166	$ 5,852,141	$ 3,195,488
Income from discontinued operations	450,959	34,825	[1]	64,881	481,946	417,076	[2]	(154,292)	[3]	102,837	[4]	453,517	1,032,611	819,138	523,829
Net income	$ 1,651,648	$ (1,479,744)	[1]	$ (1,428,618)	$ 5,018,491	$ 3,214,810	[2]	$ (1,004,338)	[3]	$ (326,916)	[4]	$ 4,787,723	$ 3,761,777	$ 6,671,279	$ 3,719,317
Denominator:
Basic weighted average common shares outstanding													10,478,312	9,339,002	8,163,814
Dilutive effect of stock options													0	720	5,865
Dilutive effect of stock based compensation (in shares)													505	0	0
Diluted weighted average common shares outstanding													10,478,817	9,339,722	8,169,679
Basic & diluted earnings per share of common stock:
Continuing operations	$ 0.11	$ (0.14)	[1]	$ (0.14)	$ 0.43	$ 0.27	[2]	$ (0.08)	[3]	$ (0.05)	[4]	$ 0.52	$ 0.26	$ 0.63	$ 0.39
Discontinued operations	$ 0.05	$ 0	[1]	$ 0	$ 0.05	$ 0.04	[2]	$ (0.02)	[3]	$ 0.01	[4]	$ 0.05	$ 0.10	$ 0.08	$ 0.07
Net income	$ 0.16	$ (0.14)	[1]	$ (0.14)	$ 0.48	$ 0.31	[2]	$ (0.10)	[3]	$ (0.04)	[4]	$ 0.57	$ 0.36	$ 0.71	$ 0.46

[1] Company classified its Energy West Wyoming subsidiary and Glacier and Shoshone Pipeline Assets as discontinued operations. All prior periods have been restated to match this presentation.

[2] Company recorded a goodwill impairment expense of $0.7 million and an unrealized gain on its contingent consideration liability of $1.6 million.

[3] Company classified its Independence subsidiary as discontinued operations. All prior periods have been restated to match this presentation.

[4] Company recorded a contingent liability of $0.9 million, related to the PUCO’s GCR audit of its Ohio utilities, reducing gross margin.